WordPress Loyalty/Rewards/Incentive Plugin

HI

I am building a wp multisite, on about 4-5 subdomains along with the main one. Been looking for a good loyalty plugin, something that I can work on to extend the capability.

I need to be able to give visitors points for every action they make on the site(s). Like, search for something, post an ad in classifieds, comment on an ad, connect to us via social media, buy something, etc.

Anyone know of anything I can build upon and get all this functionality…??