It was very profitable for a while. But there is a pool scam and only 1 pool (official pool). 3-5 selected persons get profit and they're talking about BOTNET. Of course the price goes down. Normal mining - it's almost impossible now.
First it was the "pool hack". Now they have phantom "hash power" in the pool (it's not a BOTNET). I believe there are no "top miners" and top hps numbers are just a scam going directly in devs pockets. HPS2 and Shares were never explained to the public. A lot of people are banned in their forum thread, which left a lot of question not answered.