This should not be presented as some new policy that shows evidence of a deal.
We have plenty of priests who were allowed to offer Mass in SSPX chapels and ordained in the new rite. Fr. Hesse, Fr. Gruner, and Fr. Kramer are a few examples. The policy of investigating a pries's ordination and making a determination one way or another has been the SSPX's policy for decades.
On the other hand, what is going on in Ridgefield IS revolutionary. There are real problems in Ridgefield, and the recent exodus from that chapel is proof of that. About 300 parishioners have left. Many teachers and students have quit the school. This priory was in such disarray that Bishop Fellay himself had to fly in and try to hold things together.
But here's the interesting part -- they're not all leaving for the Resistance. About 1/3 of them went to the Indult -- another 1/3 went to the local Sedevacantist chapel. And 1/3 went to the Resistance, currently served by Fr. Zendejas.
Of course, the SSPX firmly blames Fr. Zendejas, even though the problem is with Ridgefield.
Regarding the defectors to the Indult, I can understand their logic. "So you want me to drive all the way to Ridgefield where I'll be hearing the Tridentine Mass of a Novus Ordo-ordained priest? I have an Indult (said by a Novus Ordo-trained and ordained priest) closer to me; I'll go to that one instead, but thank you kindly for your offer."