@Deathhappens Short version: Some older scanlating groups threw a bitch-fit because they saw some statements about what "going legit" for Mangadex might entail in the far future. They interpreted this as Mangadex intending to backstab them, pulled their respective scanlations, openly declared their intentions to drive Mangadex into destruction, fucked around for a couple of days, then left the site altogether.
Obviously, their behavior during this whole affair pissed me off, so I am biased in favor of Mangadex. Especially since some of the scanlation groups have sold out entirely to corporate entities and now allow various forms of corporate data-collection on their sites. Leviatan Scans now has Google syndication plugins, for example.