It is not necessarily so. I mean, some gamblers claim that they win in demo mode and with smaller bets, but once they switch to higher bets they stop winning. I disagree with them. Nor do we need to make a certain amount of bets to hit a good multiplier. We can hit it right away from the very first spin. But normally if your budget for the day is $5-$6 it's not advisable to make $2 bets.
I don't know for other providers but even if you have big balance like 300-400 dollars and you play with 1-2 dollars per bet in Play n Go you will see your money draining up the fastest compared to other slot providers.In my opinion as I have been playing them a lot and I mean a lot is that there you rarely win something with a big multiplier in the normal spins and you can only win big most of the times in the bonus round which comes as rarely as possible when you play with big bets.
Pragmatic Play on the other hand makes people a bit more happy because they for example in games like Gate of Olympus and other games with same mechanics can give you a really huge multiplier even in normal spins and that is why for me they are better.