No it's not paid, it's with a fee as usual.
https://grinpro.io/Running it on my Vega64, 3.1-3.2 G/s, best speed so far on AMD cards.
That said, for NVDIA chipsets, GMiner 1.22 is out as of yesterday, giving similar speeds with the latest version of bminer, 1080ti=6.2 G/s
Also it does
not require Cuda 9.2 or higher

because I feel uneasy of trusting them without any user comments.
Could be a virus chest.