I'm wondering how can you say they are offering bonuses with way lower wagering requirement while in fact they are offering higher wagering requirement. Are you referring to other bonuses or other requirement?
Actually, I forgot to mention the fact that these wagering requirements vary depending on multiple factors. I took advantage of a particular Intertops welcome bonus from this site where I needed to wager 6x my (deposit + bonus).
https://www.vegasbetting.com/online-betting-sites/intertopsUsed a similar strategy to take advantage of a particular bonus from Cloudbet.