It looks like users lose their Donator status when they get banned. See
Alwaysmining's profile. I didn't know that.
I remember theymos wrote somewhere that for some solid reasons, he can take down a VIP or donator status. Let me find it for you.
Still finding but not find it yet. Probably my memory is about honorable VIP member that can be taken down by theymos. For actually donated VIP members, the badge stays forever.
About the banned case you listed, is it a glitch?
I really believe it is a glitch because logically a banned VIP or donator account can not lose the badge. A banned account can be better than a scammer account.
See.
Maybe they didn't donate 50 BTC but were gifted the VIP status because of their contribution to Bitcoin and the forum.
Right. I posted about this somewhere when I did it.
IIRC MagicalTux also got VIP without paying 50 BTC because he contributed significant resources in other ways.
MagicalTux got "free" VIP status for hosting the forum for a long time, too. I think that him plus Hal are the only free donator statuses I gave out. You'd have to do something pretty extraordinary to convince me to give out another free one.
I don't see any point in donating 5 BTC now and then 5 BTC later. You won't get Donator status until you've donated a total of at least 10 BTC. It'd be better for you to earn interest on the 5 BTC somewhere until you're ready to pay 10 BTC. The forum isn't in need of money.
I gave Hal a VIP tag even though he didn't donate because he is nearly as much of a Bitcoin legend as Satoshi IMO. He received the first-ever Bitcoin transaction, and he's been contributing to Bitcoin since before 0.1 was released.
Some honorable VIP members, like Hal Finney, not in the donation page.
https://bitcointalksearch.org/user/mtgox-support-42942https://bitcointalksearch.org/user/magicaltux-2134As a Donator I can tell you that we have our own exclusive section of the forum (which controversially staff members are also able to participate in) and there are a few Donators such as myself that occasionally post things in there. A quick glance at that section looks like TradeFortress was that last VIP to post anything in there.
It is a confirmation for OgNasty's post above.
There is now a forum section accessible only to donators/VIPs.