I think it's true that it's impossible for Roobet not to know about this problem, I'm sure they already know about bots and this problem so they might already have their own way of dealing with it so that irresponsible people like bots don't take advantage of it so that distribution can run fairly. and clean without any bots.
Every casino have an idea about how bots rush into such tweets and frankly saying they don't care a lot about it because the real participation is also there and prizes are not too big while they have certain conditions based giveaways as well for gamblers so you can try out that.Bot doesn't mean they will definitely win so you can also have a chance.