Telegram created Belarus language public channel. And posted poll to vote for new president with some clever restrictions. Anyone can vote, but you can't choose options with candidates if your phone number is not Balarusian. "I am not from Belarus" is only available poll option to make your vote if your phone number is not Balarusian. There is currently 736'000 votes with that option. Telegram poll https://t.me/s/tel…
So regardless of how unbiased a sample it may be the Telegram poll shows over 2x as many people (or phone numbers to be exact), willing to vote for Thikhanovskaya (at the time of writing).
Use this information as you wish.