what is such a shame is, well, two things: first, that these companies even do this kind of thing at all (i.e., age verification); and second, that it takes the kind of backlash this event has generated for them to cut ties with these companies. Apparently, it is too much to ask for any corporation to even give a damn about who runs or backs another corporation that they want to associate themselves with these days.
The bigger shame is that it took Peter Theil's name to get people's outraged about this. Discord handed over their users' identifications to a third party without regard for how it would be used or secured. I don't care if it was backed by Peter Theil or Mother Theresa - it's a huge problem either way.
And they'll do it again too. They'll find a new partner - one with less baggage - to do the exact same thing and few people will bat an eye.