To be rejected by people this unimportant can't be good for the ego, but that's the risk you run when you throw away your self respect.
What was the point of all these pissant allies-for-hire anyway? Face saving? If so, it failed.
Now trade partners... that's another thing. Not sure how a remote flyspeck on the map will serve that purpose, however.
The Donald is making noises like he might ditch the ChiComs for Taiwan, unless China shows some respect. Taiwan promoted from an irrelevancy to an apex in a triangulation scheme.
Or - just maybe - a seat on the UN Security Council. Lots of face gained there, even if the UN is a rather pretentious organization.
A lot of my US friends barely know Taiwan exists. I haven't had opportunity to ask them if they've heard of Sao Tome.