Acceptable ads was introduced by adblock plus, and it remains their primary revenue source.
uBlock is the original version of uBlock origin. Both were started by gorhill4 (sp?). Gorhill got sick of the constant support burden of people coming into his repo and reporting unblocked ads, which he then had to redirect to the filter list repos.
He handed the entire project off to some teenager with little programming experience. Said teenager did little but make a new website and request donations, core work basically halted.
Afterwards, gorhill got sick of seeing his old project be abandoned and get a bad reputation, and forked it as uBlock origin.
Thus, uBlock origin is not a community fork.