Hamster has a very valid point, period.
On the other hand, as we see in this thread, at least some members of the community would be very happy to take such offer, and I think this is the ONLY way to provide significant amount of content into Skirmish. As I said, I say kickstarter only because it comes to mind first, but it can be any kind of fund-raise.
The important thing, that some of you underline, is the promise that this money will end up as paying for skirmish content. Becuase many of the vets support Muse through buying things in the shop or whatever, and many times through actually buying extra copies and distributing them amongst their friends, promoting game. The point is - vets are not afraid to give Muse money and they do, but they don't feel output of content is proportional to they input (because Muse spends a lot on Alliance, I will never forget one of devs telling that the income coming from in-game shop is enough to pay for the artists team; but those artists work for Alliance, not for Skirmish). That's why something like kickstarter with steps and goals would make people more... well... more confident in giving Muse money.