That totally sounds like gossip to me. I'm very sceptical that "he [created] a school [as a] kind of a middle finger to them".
Niel did not come from the traditional path of the elites (Polytechnique Paris, Centrale, etc.).
He was self taught, and god forbid, earned money through minitel porn. The aristocracy considers him, well, gross.
Their CVs should be findable on the public internet.