ODESI accounts can be linked to any blockchain account. If some Hive developer wants to add Hive support to ODESI, they will be able to submit a PR for that. But ultimately the process through which Hive accounts are created, and the cost of creating them, is up to the Hive developers. ODESI will just be a second layer that makes it easier for users to interface with their blockchains. Obviously our focus will be on making it compatible with Koinos, but since it will be open source, any developer will be able to add support for any blockchain.