Trump has already tweeted about it. It's like a new form of advertising. Trick the president into thinking he convinced you to re-invest, reap the benefits of his tweet.
How do you know President Trump is not fully aware of what's happening and the PR game. It's a win-win for him, since it encourages more companies to invest in US infrastructure. I don't think you're giving enough credit.
For sure, Intel and Ford (among others) shouldn't be pandering to him. However, I understand their position and reasoning, I'd likely do the same thing.