Since they are allready working together with both companies you just have to add 1 + 1.
Also some quote by @Akerouand @Chuee :
I can’t make any explicit statements, but the facts at hand should give you a fair idea on which titles we may or may not do.
However, while I’m sure that many are disappointed about the fact that they’ll have to wait a bit longer until they can read SakuSaku, there’s also a bright side to all of this. Us working together with Sekai Project will not be a one-time thing; while I can’t talk any details at this point, you may look forward to other titles we’ll be working on.
more here : http://shinku-translations.net/july-update-plans-2/