Played my first game last night. Read the FAQ here:
today. It contains the block of text:
2.4 Gaining Power when someone builds next to you
What happens if I get 3 Power, but I'm only able to gain 2 of them? Do I still have to pay 2 VP to gain the Power?
No, if you aren't able to gain all the Power, you only need to pay VP for what you gain. In this case 1 VP.
...which sounds broken to me. If I get 3 power and am only able to gain 2, surely I pay 2VP and gain 2? The FAQ is a wiki, and presumably I could just go fix it, but since I've only played the one game I wanted to check before touching anything...