It's a bit strange that you're looking for alternatives to BC.Game in the BC.Game thread, but I'll try to answer this as best I can anyway.

I've already tried out a few sports betting portals, but so far I've liked Sportsbet.io the best. Both in terms of the selection of possible tips and the odds as well as everything “around it” (payout, deposit options, ...).

However, I still look for new platforms from time to time and will now try out Whale.io for the next German Bundesliga matches. The number of soccer leagues there is also very good and the odds are also very fair at first glance. So it would certainly be worth a try.