Some members are wondering why adserver sometime it gives us $1.06 sometime $1.10

I made some thinking and i think that i have a theory😁. If you get impressions for comments 1 impression is $0.15 , if i am not mistaken. When you reach  1$ earning or more adserver rewards you, but you cant make exactly $1 because server does not round up like that,  for example you have on ad server $0.91 and when you earn one more impression which costs $0.15  it exceeds the adserver rule above $1 and you get $1.06  SO   0.91 + 15 =  1.06