Gmx.com addresses (assuming no use of VPN or Tor exit node) excluded people in Germany, Austria and Switzerland at the time. You would always have been redirected to the country TLD options. GMX.com was a new spin off around 2009. There’s an interesting archived page here that discussed exactly this:
Gmx is popular in Germany but I think it was always a bit niche outside Germany speaking countries it was relatively unheard of at the time.
Notably, you might of heard of GMX when visiting Germany for the CCC convention. Both Len Sassaman and Dan Kaminsky presented at CCC in the same year (2007) at 24C3 for example. Dan presented for several years in a row and fiercely opposed Craig Wright’s claims to be Satoshi.
Kaminsky, Finney and Sassaman all died rather young.
>Gmx is popular in Germany but I think it was always a bit niche outside Germany speaking countries it was relatively unheard of at the time.
He also used upload.ae to share draft of Bitcoin whitepaper[0] and upload.ae was literally unheard of. I didn't see anybody saying they used it or knowing who owned it. My assumption is that it was run by Satoshi's friend or somebody that he trusted.
