I got a 50 dollar bonus this time and nothing last time. I actually made around 5000 reads in both months and earned bit more than 100 dollar. Theoretically I would have more reads than you then but I only published 3 articles per months April and may. So I think you are right it's more about how active you are. But I'm still super happy about the 50. In my email it says I am one of the top 2.000 writers which also surprised me.