Something that can cause poor scanlations is, ironically, competition. When there's competition, there's huge incentive to post chapters first. The first releas

Something that can cause poor scanlations is, ironically, competition. When there's competition, there's huge incentive to post chapters first. The first releases will get the vast majority of the views (they will often remain listed first, even after other versions come out), and cause other groups to drop the manga - even when their product was superior. And for some groups, they leverage that to get ad impressions on their own sites (or YouTube videos) before releasing them via the more generic methods. The best scanlations will usually be niche titles done by one group.