I suppose you mean for most US citizens :P

I’m not sure whether I understand this. By DT signing the withdrawal, US companies now will be able to have a lower tax rate than 15% in Ireland? Or that by signing it, the companies will push for a lower rate and threat with leaving if the country doesn’t comply?

There are awesome self-hosted, awesome non-free self-hosted and awesome sysadmin too

Yes. Not only from Twitter, though. Spotify gave money to Trump’s inauguration. So did Google, and Amazon.