I think this is a great idea. I would happily make a subscription. It is very common for people to donate yearly. Moreover, if you are already donating every year, why not have the convenience of setting automatic payments? This seems simple enough to deserve implementation without much previous discussion. After all, it is just an additional payment option.
A thought: Perhaps the subscription should allow the user to place a banner in his user page indicating his subscription level. This could feed back and stimulate other users to also subscribe and so on. Danilo128 20:37, 6 February 2010 (UTC)