It really matter from my perspective!
Because you can't really hope to play some slot on low RTP with such low volatility and get big multiplier, minimum you at least playing on some slot 95/96% RTP with high volatility to get the best multiplier because low RTP & Volatility only give you small multiplier + 100-200x multiplier for the highest that if you are lucky enough to get this multiplier on low RTP & volatility slot.
Exactly you must take into consideration RTP factor while you are hitting and placing bets on any slot game even if the amount is small because it will determine how much profit or multiplier you can hit but ignoring them and just playing for fun is a different case If you know.Most of the gamblers play on slot with high RTP and place small bets and are lucky enough to turn them into big but if RTP is low win rate reduces automatically.Because you can't really hope to play some slot on low RTP with such low volatility and get big multiplier, minimum you at least playing on some slot 95/96% RTP with high volatility to get the best multiplier because low RTP & Volatility only give you small multiplier + 100-200x multiplier for the highest that if you are lucky enough to get this multiplier on low RTP & volatility slot.
Few weeks in the future, you guys will not believe when a 6% ROI was enough to win 3rd prize on the "King of Trading" 
Finally, there is some luck on my side after so much pain of losing every deposit.
Thanks Hh and Rollbit to show that there is still hope for humanity
Congratulations on your win and coming at third position on first type of trading gambling on Rollbit and ofcourse it is good to see your fellow forum members to come up with these prizes.Best wishes to you mateFinally, there is some luck on my side after so much pain of losing every deposit.
Thanks Hh and Rollbit to show that there is still hope for humanity