A lot of place also block it due to Yandex being full of spam accounts, even on custom domains. Not sure I'd ever trust something from them and would actively block their services.
What do you trust? Reuters? The UN? Russia? I don't believe you're actually open to the idea. Prove me / us wrong by saying what it'll take to change your mind, or by saying you're not open to anything.
Asking for sources is fine, but show your own work as well.