I come from a country excluded for betfair. I am irritated by betfair brokers, it's not the same. There is no worthy alternative for them. Why has no one built something similar, based e.g. on BTC? Isn't it a profitable business? Is it worth it to ban an account from an allowed country? I have doubts, most of it is probably a scam, and after some time it can be blocked anyway.
Everything has been clearly stated in their
Terms and Conditions and you can read the T&C here:
https://www.betfair.com/en/aboutUs/Terms.and.Conditions/They have clearly said about who can have an account there and will be able to play gambling or betting there.
A gambling site has its own right to do such T&C, moreover related to a country restriction. Commonly it is not based on they don't want to accept you because they don't want, but they only obey such regulations, and if they break the regulation by allowing such suers from restricted countries to join in their platform, they will probably get punsihment. And will they risk themselves to this only for several small suers? No.