In light of the heightened amount of "will I get my rewards" posts, I'm seeing, I'm just going to compile a small compendium of useful information for everyone interested in their end of season rewards, suspensions or otherwise...

Directly from LoL homepage:

You will earn rewards based on the tier you are in at the end of the season in solo queue, or based on the tier your team is in at the end of the season. You must have won at least ten games with that team in one queue (for example, winning six 5v5 games and four 3v3 games does not count--even if both the 5v5 and 3v3 teams have the same name and the same players).

In addition, players who whose behavior is among the most negative in their region will NOT be eligible for end of season rewards. In most regions, this penalty will apply to the most negatively behaved players who are ranked restricted (or chat-restricted in regions without ranked restrictions).

For more information, refer to the FAQ

Red post by RiotSocrates about ranked and chat restricted players:

Q: Will all chat and ranked restricted players be ineligible for rewards at the end of the season?
A: No, of the chat and ranked restricted players the ones with the worst behavioral records will not earn rewards.

Q: Do you expect to see the quality of normal draft decline from this?
A: We see that a players behavior shifts pretty dramatically based on the queue they are playing in. Since normals are less stressful and players who receive ranked restrictions will also receive chat restrictions, we don't expect to see an impact to the quality of the queue. That said, we'll be closely monitoring the health of the queue to ensure there isn't a negative impact.

Q: Won't these players just feed, troll, and AFK their way through the games?
A: Players have to win a certain number of games to lift the restrictions, so this would work against them. Also we'll reassess players as they near completion of their ranked restriction games. If we still see a pattern of negative behavior, the restrictions will be reinforced.

Q: Can players decay while they are ranked restricted.
A: Yes.

For more information, please read the full post, and comments.

Read more about Ranked Restrictions here

Read more about Restricted Chat mode here

A very good reddit post by /u/Starxs similar to what I'm doing:

Riot Ymir: "The End of Season rewards will really hit the top end of the negative Behaviour scale"

/u/Starxs' view: The term "most negative" was used in lots of posts to describe who will not be getting season rewards out of the restricted players but this wasn't very useful to see if you was at risk. However in the past day perma-bans and two week bans look to have been sent out, to these player what seems to be the worst on the "toxicity" scale.

Evidence (From Riot Lyte): "Players who are getting 14-day bans are over a certain threshold of excessive verbal abuse. Players that you mention who are excessively racist/sexist or throwing around death threats get a straight permanent ban."

Regarding LeaverBuster bans, added:

Q: Will being banned by LeaverBuster affect my end of season rewards?

A: ^{This is not a Red post!} "The only way leaverbuster would be able to effect season rewards would be by a permaban"

A lengthy FAQ on the season 3 end, by Yegg (ANSWERS FROM SEASON 3, still viable though):

When does the season end?

The 2014 season ends on November 11, 2014 at 12:01 AM PST. A countdown, if you're into that sort of thing

When will I get my rewards?

We will start granting rewards with the patch downtime, although it may take a few days for them to show up for every player.

How does the bonus fourth icon work?

Players who earn an icon in all three queues will unlock the bonus fourth icon based on the lowest tier achieved in the other tiers. In other words, a player who achieved Gold in all three tiers will get a bonus Gold icon. A player who achieved Diamond in Solo queue, Bronze in 5v5, and Diamond in 3v3 will get a bonus Bronze icon.

Who will see my loading screen border trim and when will it be displayed?

When playing ranked, these will only show up when playing in the queue where you earned them. In other game modes, the border that you earned in ranked solo will be shown.

Regardless of game mode the border trim will only be displayed to your allies, as we want to be very careful about influencing perceptions around the fairness of the matchup before the game begins.

If I have an honor ribbon and the loading screen trim, will they both be shown?

Yes, they will both be displayed. The honor ribbon sits on top of the border trim.

If I got Gold in Season 1 and Platinum in Season 2, will I have two forum badges or one?

You’ll have two forum badges, one for each season.

Are the forum badges split out by ranks? Or do they show the queue where you achieved the medal?

No, in Season 2 the ranks were intended just as a way to show some visual progress towards the next tier. The forum badges are very small and already need to indicate the tier and the season, so we aren't currently planning on using them to convey more information.

What will happen to my icon border from Season 1?

We are removing the icon borders and giving everyone who had one a Season 1 summoner icon commemorating the tier that they achieved. We have big plans for summoner icons in the future, and this gives us the freedom to integrate borders into the icons themselves where it makes sense.

If I got Gold in Season 1 and didn’t play ranked in Season 2, will I still have the Gold profile banner trim?

No, the profile banner trim is based on performance in the most recent season.

I'll be adding more as I find more questions to be answered. Hope it helps at least someone. Feedback is appreciated.