This baffles me the most. Majority of people who read here, don't really care where they read, they just want to read it in one place. Or at least place which has most of their stuff available. Readers, as bad as it sounds, don't care who scanlates, they only care about quality, speed and availability of translation. So now that they decided to post only on their own separate sites, most people will just switch to more predatory aggregation sites, which don't even credit the scanlators. Which is both sad and disappointing.
Also, mangadex gave them option to delay releases, which would give links to their own sites (about which I wouldn't know otherwise!). So overall, seems to me like it was just childish tantrum. If they cared about readers, they would leave their releases here and made announcement that they will stop posting on this site and only publish on their own site.
Also, I think this place is not the place to discuss it, but can't find place to vent out about it, sorry.