I started to run this campaign for a group of players who weren't sure they wanted to commit to a campaign. My goal was to slap them into a dungeon crawl on a random level, knowing I could use the module for a real campaign later.

But now we meet every week, make RP based decisions, and all sorts of stuff. They've made it through like 4 levels already (we started on level four, pc lvl 8)

What I'm not getting is that the PCs occasionally laugh, smile, and talk to me about the campaign outside of sessions..

What am I doing wrong? How do I get everyone to lose interest and ghost me, as I was set to expect by the dnd community so I can get to work preparing for the real campaign?