Indeed, a lot of words from pg and sama, and no observable actions.
Sam Altman and Paul Graham have spoken out. Sam has also posted specifically about Thiel (http://blog.samaltman.com/the-2016-election). They've donated to campaigns. They've likely done other things as well. If this one issue is this important to you, indeed, actions do speak louder than words, and I'd expect you to take similar actions in your own lives.
What are you doing?
I'm glad to hear you're sticking to your convictions and getting involved. Unfortunately those two things alone, coupled with dissociation, can equally describe a lot of hateful groups as well. It can also lead to the "tyranny of democracy", when those in power aren't listening to those who they may disagree with yet still represent. I think all three (conviction, involvement, engagement) need to be blended for a truly fair and good end.