I've been offering SD for my giveaways, but so far there's been no takers. XD It might not be as big a problem as it seems.
There is no harm in giving away a bit of currency at the beginning (this is still the beginning) - it gets people used to it at no risk to themselves.
After all, it worked for Moist von Lipwig! XD ("Making Money", a Terry Pratchett novel about the introduction of paper currency on Discworld.)