Raising your stake by twenty five percent to double trigger frequency sits between normal play and a full purchase. It stretches a balance further than repeated buys while still cutting down the dead spins that make base game grinding tedious. Side by side figures for ante bets versus direct feature purchases are explained on https://thebonusbuyslots.com clearly enough. Personally I find the ante option better value on high volatility titles, though the difference is not huge.
