Brilliant.org interview questions

Two rounds of interviews with a take-home assignment. First HR screening phone call. Second round with the hiring manager. Overall process took around two months to complete. Take-home assignment was also compensated.

Generic phone screen with an external recruiter, followed by a meeting with the director of engineering / hiring manager via Google Meet, followed by a take home technical assessment. After completing the take home I was informed my solution was "good", but not "great". No further feedback was provided. The take technical assessment was advertised as being compensated; however, since completion - the internal recruiter has completely ghosted me (and I haven't been paid as a result). A bit sus...