Comment by permo-w

I could be wrong, but I think I've seen it fail on more obscure sites. But yeah it seems unlikely they're maintaining so many premium accounts. On the other hand they could simply be state-backed. Let's say there are 1000 likely paywalled sites, 20 accounts for each = 20k accounts, $10/month => $200k/month = $2.4m a year. If I were an intelligence agency I'd happily drop that plus costs to own half the archived content on the internet.

Surely it wouldn't be too hard to test. Just set up an unlisted dummy paywall site, archive it a few times and see what the requests looks like.