Im an SDA and I know about Amazing Facts. Amazing Facts in SDA land is run by conservative SDAs they are part of the SDA church but they have different doctrine than the official SDA church. The Amazing Fact people have their own meetings separate from the churches meetings. One very strong doctrine they have is they beleive Jesus had a sinfull human nature and this one doctrine flaviours their whole theology that flys in the face of the protestant doctrine of 'righteousness by faith'.
These conservatives have cultic idears such as they beleive they are the only true ones and everyone else is mistaken. For the most part they would shy away from going to other denominations for services.
They are sometimes called CBs [Concerned bretherine] or Adventist catholics because of their theology. Yes they do have cultic traits. I cant reccommend them at all. Barry