Can't call all best ebetting sites, but the one I am constantly choosing is
https://egb.com/play/simple_bets. For me it is very important that at this site they have a great variety of egames: CS:GO, StarCraft2, Dota2, LoL. They have a huge amount of attractive bonuses (e.g. promo codes, referral bonuses, etc.), promo actions and live streams. And what is very much important for me is betting with
BTC. Check it!