It really seems like the login just stopped working, and suddenly everything is changed to dfirst.ai.
I tried contacting support by email and through the chat on the website, but nobody answers.

What feels strange: I still get weekly emails from the founder, trying to sell the Black Friday offer — even though I can’t use the product anymore.

For me, this looks and feels like a scam. I would be careful and don't conside to buy there anything.

The founder and the company is still very active and posting at linked.in and co about the success of his company.