No mate based on my experience all mining site is a scam you cannot trust them. i suggest to dont  easily fall  if there's a paying stuff before you can withdraw your earnings on it. cause if you pay for that stuff after that it shows pending withdrawal always and it will not be successful just a pending withdrawal..  like the other mining site which is promising that you will became profitable after.  But it is totally a bluff i suggest to invest or trade instead of mining in any site which is also promising that will you can earn more profite. .but it's not true.