That sounds so strange. But I guess other blockchain asset backed games pawned the path already. Apple usually just declined the new upgrade and not stating any reason just pointed to read their general rules. It is seed that 2017 year is behind us when bitcoin and blockchian made huge leap forward in minds of just everyone. Even Apple store.
We live in interesting times! Just a note as I didn't know this was possible but I received a blockchain creature in the free pink portal the other day. There is a way to blockchain creatures without buying. You just need to get lucky!