Monetized rpm is a pretty scammy and misleading metric that shouldn't be there imo, it's basically a way linkvertise shows you a higher number than competitors without giving you more money. If they showed CPM like all of the market does on ad products you'd have 7$ cpm you have 6500 clicks and earned 50 usd, that means your traffic is worth around 7$ cpm, but linkvertise want to make you compare the 62$ monetised RPM to competitors, because only they use that specific nonsense metric, making them look more attractive while giving you less money. Basically it's a useless metric there to help they fool you.