I have made Macedon a protectorate as Scipii in a new 1.2 campaign and they definitely don't take your money. I'm fairly sure, however, they do give you some of their money. I recieved a huge (about 80000) lump sum on the first turn, and am receiving about smaller amount (6000-8000) every turn since. It shows up under the diplomacy/tribute section of your balance sheet. Their territories also count towards your total.

I've only had them as a protectorate for a few turns, so I'll report back if anything interesting happens after I've played a bit more.