Has anyone here or anywhere else ever suggested the idea of removing the serum cost and the rewards from story chapter that players have completed?

Like, I know this might sound odd, but I feel like there's an insentive to not play the older content once you've done it. Since the Serum you spend to play any previous level/s, would be better spent on pretty much anything else.

Like, if I wanted resources, I'd either go to the Resource missions. Or the event during every patch that allows repeatable battles for an event shop with a choice selection of resources.

So with that in mind, take away the Serum cost, so we don't loose out on wanting to enjoy the ood content. And take away the rewards so we can't "abuse the rewards".

Your thoughts?