0.20$ seems to low for being active 7 days on both groups. We need to talk like 4-5 minutes every day on this groups or it is ok to just leave 2-3 messages then leave and do same thing tomorrow? I think you should give at least 0.5$ or maybe 0.7$( 0.1$ a day), because with 0.2$ people will not be interested in talking serious on your groups. They will just talk there to make their daily job for you. With a bigger reward people will be more interested in this, thats my opinion