Riot is not a family tribe.
So u mean riot and kraken are not family, they are separate entity or only allies. So if your top players leave and join you ally what u call that. Infact u were the leader of Kraken and u r now in Riot that shows what the relationship is.
Hate and GNAt merger and they did exactly what kraken and Riot did. the only diffrence is Kraken did not changed the name while GNAT did.