That very business was indeed covered early on in Season 8, and there have been other 90DF couples who also say that they’d broken up prior to filming, and the show’s producers asked them to fake it anyway, so there could be validity to Stephanie’s claims.
After that, Stephanie Davison went on to say that she eventually agreed to continue appearing on 90 Day Fiancé while faking her relationship with Ryan Carr on the condition that she could promote her personal business on the TLC reality series.