They claimed there's a limit of 5000 people
Yeah and my dumbass cousin is in a MLM scam called scentsy and they have "3 limited spots for new team members" . Which means, they have unlimited spots and they need to create the illusion of getting people on board. When they're down to "1 position left" be sure to ask them who the other people are that signed up and if you can join a chat with them or meet up with them! It's all eating glitter and farting rainbows until you question these scamming asswipes. Then you never hear from them again.
First, blockchain.info is not scam.
Second, someone trying to scam you with some trick using blockchain.info which does not make the owners of the website scammers.
I personally use the website since the existing and i can say at 100% blockchain.info is not a scam, but the person trying to scam you.
Lol #1 isn't true at all, but I do agree that obviously this wasn't blockchain.info that you where talking to.
Google "blockchain.info hack/scam/private key algorithm". Have a fun read. Use cold storage.