Seems…okay.
The ACLU needs tech ninjas, tech ninjas are there, and Y Combinator has worked with other nonprofits. Their excuse for keeping Theil around is actually right up the ACLU’s alley (lest we forget, the ACLU does support the free speech rights of nazis and hatemongers).
So, okay. Not great, but if one insists on ideological purity, you’re kind of insisting on a practical failure.