These people keep promising each other that they will be vindicated. That all of the "so-called-smart people" who thought they were so stupid and so delusional will eventually find out that they were right all along.
But ultimately, it's about respect. It's about feeling like they're finally being seen the way they most desperately and secretly want to be seen, by "QAnon" and the QAnon community at large -- not as uneducated, worthless cafones, or as the family kook, but as true patriots fighting for a righteous cause, as rebels with a cause, as brilliant and clever "researchers," as people who cannot be fooled, and as the only people who know what's really going on. These people feel disrespected and looked down upon, and that makes them vulnerable to an ideology that promises them that "I'll show them all!" moment without much actual effort on their part other than simply believing it. The irony here, of course, is that believing this #### is going to make them seem even more repulsive to everyone around them than they did previously.
It is actually pretty sad.