You get a little thing under your name that says so.
Apart from that, I used the site for about 18 months and as I had used a LOT of info about stuff from the site decided that the $15 (or whatever it was), considering I get a lot less from street machine and it costs $8/mth, would go a long way towards something Wayne had planned.
As it was, within a week, Wayne paid for a little program that did something on the site and I felt a WHOLE lot better about it as, IIRC, the donation I gave went towards whatever it was.
For me, it was nice to know where it went, even if I couldnt 'see' it.
But like I said earlier, at the time there was no expiration on membership, as that was something we spoke about before I paid up