There is nothing wrong with the RTP, it would be a problem if the Casino provided different information between in-game and on the casino site.
Nolimit City has several versions, 96% 94% 92%, The lower RTP is called the DX version,
Not only Nolimity City, Relax Gaming also has several RTP versions
All competitors in the same slots have a 2% higher RTP.
Not at all, Bethog, Casinopunk, Betcoin.ag
(in the past) also provides the DX Version