Complex sentence: Like most pyramid schemes or Ponzi schemes nowadays, his was an'affinity' scheme, in which he ripped off people of common interest, in this case, local non-profit organizations and Christian charities.
Split into simpler sentences: Like most pyramid schemes or Ponzi schemes nowadays, his was an'affinity' scheme, in which he ripped off people of common interest. In this case, local non-profit organizations and Christian charities.