Though there is nothing to do here on external sites you can add things like AdSense. In 13 years of blogging I've never done this, and sometimes paid a modest fee to stops.
This afternoon my son put AdSense on his Tumblr account, as he is 14 this has to be registered in my name. His teen fashion aggregation thingey clearly has an appeal: he's already made £9.83. His motivation to code, to follow the analytics, to dream up ways to promote his blog and to select images and make fashion choices is compelling to witness.
Vicarious learning? On the fly? Collaboratively? Touch-typing. Online Marketing. Social Marketing.
Wit and youth appear to do the trick.
Meanwhile a game I played scribing content for an old blog and pandering to thes viewing figures may find its reincarnation.