That is completely false. E2T does not receive any kickbacks on commissions for trades, and commissions are absolutely paid.
Earn2Trade makes its money from the subscription fees of the examinations. It is not a mystery. There are no illusions to dispel and there is no smoke in the air. The company has been transparent about the way it makes money from its first day of business, and sees no conflict in generating revenue from examination subscriptions.
The FCMs are interested in working with the prop firm because it can bring substantial trading volume generated from its traders. With over 500 traders having passed the examinations in the last six months alone, it is not a surprise that an FCM would be interested in working with the prop firm for the commissions it would generate.