Yes, that's my feeling too. I've seen a few ad sites for vintage MX that charge and they don't work. As far as donations go, well... it's a trickle thing. When we have a bit of a thread like this one there's a spike and a few do, the rest of the time nothing much. Again though, I'm not trying to influence people into donating - the cost is not prohibitive for me. And it's my choice to do it. But rest assured, unless donations increase to the level I can start doing the overseas travel thing, anything I get just helps me cover the costs.
The main worry is that the Ning guys have decided that free is no good for their bottom line, so there is likely to be a fee for the sites I have set up on their platform. I will know more when they show their pricing model some time in the next week or two.