My supporter status lapsed, presumably today or yesterday. I noticed this because I lost my blue site theme and was shown ads. I don't think I was ever given notice (at least, not on the site, or not that jumped out at me to easily notice) in advance of expiration (I'm not complaining about that. I renewed immediately.)

This caused me to think a bit about supporter subscriptions (for lack of a better word), and I've thought of a few things might make sense to help keep supporter revenue up, and/or give supporters a more seamless experience.

1) Auto-renew - I know that some people don't like this concept. But, it is used all over the place because it works. If we were to do it here though, I think it should require a very easy and obvious opt-in, not a complicated opt-out like some places use. It should also be very easy to cancel. Auto-renew would be especially helpful for people that need to pay for shorter terms due to budget. I think it would also be nice, if opt-in is used, for Supporters to be reminded that auto-renew is about to occur, so that they can cancel if they don't want to be charged.

2) Longer term options - If I had the option to do so, I would have considered signing up for two or three years. This would be even more enticing if the price went down for multiple year subs, similar to how it goes down with longer monthly subs now. I paid $30 for a year of Silver. I'd probably have paid $55 for two years or $75 for three.

3) An annoying pop-up that appears as the supporter's expiration date gets close - Maybe it appears one time at 30 days, once at 14 days, then daily for the last week, or something like that. This would just serve as a reminder to resub, obviously.

On a similar note, I think the supporter program should be promoted more. Just a (sticky for a few days, maybe) post from time to time talking about the importance of Supporter revenue to the people that make the site work would probably do the trick. Also, a pop-up that appears once in a while wouldn't be too bad. Considering the quality of this site and forum, and the amount of work that I know goes into keeping this place great, I don't think it would be unreasonable at all to push a little more for a little money from those of us that hang out here.

Anyway, I'm just putting this out here.  Those of you who know about how this stuff works can tell me (or not) if any of this is workable.  I'd also like to hear the opinions of other users, as to whether these would be seem as improvements.  Other suggestions to make the program better would be welcome as well, though I mostly want to focus on the business side of the program - things that will drive revenue.  

Finally, I'd like to say that I feel like I get a lot of value out of my $30/year Silver Supporter subscription.  I encourage anyone that can comfortably afford to sub (starting at $18 annually, or $2.50 monthly) to do so.  It's worth it just to avoid the ads, and it helps get a few bucks to the people that do the work to keep this place running.  

Just giving this a one-time bump. I know it ain't a hot topic, but there's gotta be someone around here with some kind of thoughts about the Supporter program.

As the person who put the system in place, I think your suggestion are good ones and doable. I'd have to look into it after I'm done with changing the front page hardware chart. Here's my thoughts on each proposition:

1) I think there's an option to do with PayPal (which we use for the supporter program), although I'd have to check with other admins if we want to go down that route. If we work on your other points an auto-renew option might not be needed
2) That could be easily doable, I'd have to check with @Machina about the pricing model we'd use for longer terms.
3) While I'm not a fan of popups, I think a reminder before expiry could be useful. We could change the "Active VCG Supporter" button in the top menu to display the number of days left when a subscription is say under 20 days from running out and the background color could change as you get closer to the end.

A picture of a nuclear bomb with countdown timer should suffice.

Edit. I forgot to mention that is for non supporters, for supporters  a picture of their avatar showing Trucks holding a gun to their head is suitable.

Ah, I agree on this threads OP. Same for me, I noticed my sub had expired once I lost my blue theme. Seeing this thread I was looking around to find how long my subscription works. Finally found it in the VGC-Supporter button (where else, but I started in my profile) to see it is still good til November. Anyways, as I clicked a bit around to find my supporter status.

With that in mind: could you add a button to the profile (like badges and posts) to direct me to the supporter site, as this was the first point I was looking for my current status. Also I didn't see which tier I subscribed too (I know it is silver, but I can't see as I turned off the badges on the avatar). Would be nice to see my current tier there too.

I really like your third idea. The button is well visible, but it would probably much less annoying than a notification.

As others have mentioned, I think changes to the supporter "button" would be a much less annoying reminder about renewal, and would get pretty close to serving the same purpose.