Actual roi on crypto beting site "jackpot" promos? anyone tracked theirs?

been bettiing on trustdice, stake, bc.game for bout 6 months. all of them have these flashy promos and "jackpots" but I've never hit anything significant. anyone here actually track their roi on these promos? are they worth pursuing or just marketing gimmicks?
also curious if anyone's hit a major jackpot on these sites (over 1 btc) and actually got paid. starting to think they're just for show
 
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