You're right, this worked. I didn't read carefully enough. It just reproduces the wallet ID and even the password I had already.
Were you required to confirm your login through your email address?
Nope, the 24 words were enough. But they instantly sent me their newsletter.
It's been a long time since I last used blockchain.com wallet, but if I remember correctly, sometimes I had to click a link they sent me via email when trying to log in.
I think that's for an older wallet system, mine was "only" from 2015.
If I recall correctly, when I recovered my old "blockchain.info" wallet that consists of 17 phrases, using the seed alone did not lead me to the correct wallet; it also requested a Wallet ID, and providing a random Wallet ID led me to a different wallet with no funds.
Maybe they used the 7 additional words to recover the Wallet ID.