Looks like they put together a collection from all the usual macro providers, so it really isn't new content.
But a nice selection, nothing wrong with it.
List prices like offset or getty, so no problem for stocksy, that offer their content at a much lower list price.
Artists that are with blendimages, cultura etc...have the advantage of seeing their files offered allover the macrostock industry. They just supply their distributor and don't have to worry about individual agencies.
Probably dissolve will also take additional content, but will they also offer a macro distribution program?