BetOnline bonus rollover

Has anyone actually finished the full rollover on one of these deposit bonuses without feeling like they’re running uphill in a hurricane? I get the appeal of the “free” money, but the second I see an 8x or 10x rollover requirement, my brain flashes warning signs. It sounds so simple, just bet enough and you’ll clear it, but I swear there’s always a cold streak right when you start chasing that rollover. I’m pretty into stats and risk, and I can’t decide if going for it is just asking for variance to chew you up.

Is there a specific strategy or bet type that actually helps grind down the rollover, or is it just luck and patience?