It's always up to owner. But crypto - non-commercial structure, and owner can be considered as OP's (before code's published, community've almost nowhere to go, if they like concept, and sometime ago in Nxt BCNext held all power as well, besides full TF algo still don't revealed) and/or as community itself (like through Nxt-thread). Ofc, there's full-owning before launch and boundared owning after (correct "crystal palaces" in coredevs minds, common funds like in Nxt and so on).