Actually, the team behind archive dot today in at least spiegel.de has premium accounts, I presume bought with anonymous credit cards.

You can see artifacts when their servers are at queue load and you see the URLs, a few resources have the JWT with the account details in the URL. IIRC the clearname of the account in the token is Masha Rabinovich, with an email account masha@dns.li, an identity that has cropped up in various investigations [1][2].

[1] https://gyrovague.com/2023/08/05/archive-today-on-the-trail-...

[2] https://webapps.stackexchange.com/questions/145817/who-owns-...