When did Binance say so? It's important, because lately they've turned into an exchange obeying regulation and they have already frozen this year the funds of Nigerians (most probably) because of official requests (just I didn't follow the story closely, hence I don't know if those funds got unfrozen meanwhile).

And even more: one should not really trust in what these businesses said. The policies can change over time. The existence of the business on certain markets is usually more important than a few unhappy customers for which the public can be convinced "it was their fault".