This comes off as a super slimy article. You're even trying to imply that there was prejudice against you. That's silly thinking.

Your model of the world is a bit broken. Keep in mind that PG is a) effectively retired at this point b) inundated by bullshitters like you.

How is this a "thank you"/love letter when you're trying to promote your company in it?

There's an obvious conflict of interest going on.

Just go ahead and make the translations for whatever articles you want and then send those translations to him. Don't wait for him to reach out to you. If you loved him, you'd go ahead and do something that wasn't guaranteed to promote your company or otherwise give you profit.

I find it odd that the author was miffed about not receiving a response to a thank you letter. Is this a cultural difference? What are the norms in the U.S. and Italy?

Apart from feeling intense cringe when I imagine having to write something like this, I can't help but disagree with your statement about SV.

Silicon Valley is the most toxic disease of our times but money has made most oblivious to the fact. And if this trend continues, then money will also be the one thing that puts an end to humanity. Sorry to burst your bubble.