NXIVM is not a sex cult, it's a marketing company selling very expensive 'seminars' - i.e. it's a scam where rich people are convinced to pay thousands of dollars for stupid 'success programs' to improve their life. Some female members of NXIVM were also recruited for a rather extreme sex cult ran by NXIVM's founder, but NXIVM and the sex cult were not directly related.
Grace Park was a member of the former, but not the latter. She didn't do a "recruitment video", but several videotaped interviews with the company's founder, which were posted to the net for advertisement purposes. She tried to have these clips taken down in 2017, which suggests she's done with NXIVM. I'm not following this too closely, but what I heard about her involvement makes me question her intelligence more than her ethics.
As for the pilot: I did like most of the actors, especially James Roday - who I couldn't imagine in a role like this before, but he's spot on. A bit too much drama and mystery going on, but it was a pilot, so let's cut it some slack. I'll keep watching.