I’ve found that when playing slots on CW or at land based casinos, that no bet level continuously pays out acceptable amounts, which I define as being higher than the bet amount. Therefore I’ll play a range of bet levels, and when I start seeing a run of no wins or less than bet payoffs, I switch to a different bet level.
I never stay on a bet level or a slot that’s not giving me a good return. That’s how people lose millions and billions of coins. It’s not real money, but I still had to work hard for my coins and won’t giving them up easily. Often the slot bet levels with the highest jackpots pay the least or pay infrequently, compared to lower bet levels and jackpots.
These days when I get Free Spins, it’s usually not until after I’ve been playing a slot for awhile, and switched bet levels several times, then gone back to a bet level that wasn’t paying well before.