I can answer you as I’m the member who moved after 3 years, personally I still feel grateful to BESTCHANGE and I created an alternative account to promote them for free (as an expression of my gratitude( but over time you want to go on a new deal and that's what I did.
As for the reason that I did not do that before, it is because most of the campaigns during 2020 to 2023 were gambling campaigns, casinos, or loans, and these three things I do not like, and I have almost 0% posts in the gambling section during the 6 years I spent here.
In 2020, I was in a CHIPMIXER campaign, and from there I moved to BESTCHANGE, and perhaps after the disappearance of CHIPMIXER, more mixers campaigns appeared, so I moved.