You have donated to IEGMC Europe, which was hosted by Black Wyrm's Lair, and the 100% of its bandwidth and other server costs were payed by some very generous members of Black Wyrm Group. TheWiz maintained (file list, upload, download) it. The PayPal method you used unambigiously displayed that the donation goes to Black Wyrm's Lair, which provided the full financial and technical background for IEGMC Europe.
The history:
Long ago, TheWizard founded the mirror called IEGMC. As the Marketing Manager of Intermedia Network Services, he set it up on one of the corporation's servers. IEGMC Asia is located in Singapore. IEGMC Asia has been running there up to the present. All of its costs are payed by the ISP corporation itself (Intermedia Network Services).
Almost a year ago, Black Wyrm's Lair -- having its server in Europe -- offered to join the IEGMC by expanding its network with an European server; so those mod players in Europe could get a better connection and download speed. In March 2005, Black Wyrm's Lair (consequently IEGMC Europe as well) moved to a new server, which has been functioning up to now.
The costs of IEGMC Europe were payed by some members of Black Wyrm's Lair, who regularly donate bigger sums from their own pocket in order to keep the server up & running. The international connection and fast server costs a lot of money, that's why we have put a PayPal Donation button to our IEGMC Europe Downloads page -- and that's the button you clicked on. TheWizard also put a Donation button to his page at IEGMC Asia, it could be used to donate to TheWizard's paypal account. Although he doesn't pay a penny for the hosting because the Corporation gives the mirror for free, I don't question the correctness of this at all: TheWizard has spent a LOT of free time to update the mods files etc. so I am sure he deserves the money.
Which Black Wyrm didn't agree with was that TheWiz wanted to receive all donations to one account (accessable only by him) and then to send Black Wyrm's part. Black Wyrm's members didn't find this acceptable, because -- while they relied on TheWiz -- they thought it's not acceptable that the movement and amount of donations would have been uncontrollable. I agree because they sacrifice a nice part of their own wage to keep the server running and they would like to learn about donations at first hand.
All in all, the answer to your question, there are two 'groups':
1. TheWizard and his corporation which hosts IEGMC Asia. To my knowledge, IEGMC America and a NEW IEGMC Europe server is also running. Black Wyrm's Lair has nothing to do with these.
2. Black Wyrm's Lair: they provided hosting for the former IEGMC Europe, and now they are hosting Dragon's Hoard. (To sum up, Dragon's Hoard is running on the same server as IEGMC Europe did until last Monday.)
So if you are satisfied with Dragon's Hoard in the future and want to contribute, you can do it the same way as before, with the PayPal button here:
http://dragonshoard.blackwyrmlair.net/download.phpI am sure that the IEGMC mirrors (now independent from Black Wyrm and Dragon's Hoard) also have such links, so those who would like to support TheWiz in his work can also do it in a secure and quick way (paypal).