I have spoken to Ecogra about this and they in turn spoke to Grand Prive and MGS. After a couple of days, eCogra communicated that they cannot intervene on an official level as the Grand Prive aff program was not certified by them. They do certify some other aff programs. They also said that an official comment and explanation from Geand Prive would surface soon.
Thanks for the info Dominique! Am thrilled to hear those explanations…