Commision just cut from $21 to $3.50! Did I do something wrong?

I had the same thing happen to me with a product that I had actually bought and used myself the dill weed tried to give me a bunch of bs so i told him to go f himself found a similar one changed the links in the articles I had written with quick notes on the articles and my commissions went up....now im fin google slaped again for a free listing...