With Winner, I organized a contest on Instagram for just 1 ruble! At first, I planned to use free services like I had done before. However, they turned out to be not very convenient, and then I stumbled upon this service with an almost free plan. It works the same way, but without the need to watch ads. Additionally, you can set several conditions for selecting the winner and establish multiple prize places. The contest went successfully, and the service did not let me down. It's a pity that next time I'll have to pay for the plan since I can only run a contest for 1 ruble once.
