I do memolink, rewardtv and e-rewards as well. Also I do send earnings, inbox dollars and snap dollars but just click on the paid emails. I'm haven't reached the $30 cashout option for those three sites yet so I don't know if they pay or not. I figured it doesn't hurt to try them out.
I haven't heard of the sites you mentioned. If you are hearing good things about them it never hurts to try them out to see what they are like.