Good fucking riddance honestly.
While I admit, Jamal's Bukkake provides good scans and TLs, I won't miss them. The two week delays, their bitcoin mining website, their fanboys shitting up comments whenever something got sniped, I'm glad they won't plague my eyesight anymore. I'll just keep reading them on mangarock in slightly worse quality if needed. And other groups sound like literal whos.
As for Mangadex going commercial, eh. It'd suck for sure, I'm not gonna pay for sure.
But when it comes to worst, I expect same thing to happen that happened with Crunchyroll - people will steal their stuff, share it via torrents, and maybe we'll have a nice app that checks nyaa for new uploads of mangas you follow.
If you're against piracy, then well, good luck kiddo.