I won't purchase a subscription or give permanent permission for charges to my checking or credit card; but I would be willing, sometimes, to purchase a package of credits, teleport tokens, etc. on a one time basis. Think about offering a $10 - $12 pack -- more expensive than the monthly access, so that subscribers don't feel cheated -- but without the long-term obligation. I think many of the casual players might be more inclined to send dollars to Tiny Speck if this were an option.