I think a lot of your information here is wrong. I have a few accounts here on HP, this being my least active. One one I have many followers, but my views don't come from those followers. Actually in 6-7 years of using this site, one thing I have learned is that the amount of followers here is not really a factor for how many views I get, and followers routinely aren't actual followers. Instead they are just hoping for a follow back.
The amount of views a person gets will depend on the target audience. If writing about evergreen ideas, then the target audience will be google searchers. Which means followers has nothing to do with it. You don't need juicy gossip to get views from google. You need quality articles about things people will always need to know about.
Will you get rich on most writing sites? Of course not, but if done right it can pay a few bills.
So to answer your question, I think many writers have a hard time making money from these sites because they don't want to adjust their writing to make google happy, and their expectations are higher than the reality. The key to online writing for me has been keeping my eggs in many baskets, and figuring out how to keep Google loving me!