Betting tournaments and races

Has anyone participated in weekly competitions at such venues? How transparent is the rating and when are the prizes coming? Does it make sense to spend time participating?

One day I decided to try to participate in a competition just out of curiosity. On casinoshuffle.co.uk , the table was updated in real time, and you could see your place without refreshing the page. After the end of the period, the payment was received without delay and without additional confirmations. I didn't chase the top lines, but the process itself turned out to be interesting and transparent. Now I sometimes look into the active events section if I have free time. In general, after several weeks of use, I can say that the main points work stably and without unexpected difficulties. Of course, everyone has their own criteria, but it turned out to be enough for my tasks. I can't say that this is the only option, but it's enough for current tasks. Maybe I'll try something else later for comparison.