Did anyone expected that Ronaldo will make a move to Al-Nassr. It happened and a season over, throughout the season he was the talk. Whether he performed or not is secondary. Same as that Messi had made a big decision that were not in the list. He's much welcomed and he himself had mentioned his dream enjoying the life in USA and now it had come true. The universe is turning to be more connected through different leagues.
Actually moving to USA is something that became classic comparing to moving to Saudi Arabia and leagues in the middle east region.
Messi didn't want to move to Saudi Arabia because his wife and children didn't want to live there, otherwise his relatives were supportive because of the nice check. Since moving back to Barcelona is risky then picking Inter Miami was the best choice for him at the time, since he can practice and keep himself warm for the next international competition with Argentina.