This is an absolute scam, 100% guaranteed. Don't waste your time.
It is more profitable than buying bitcoin in an exchanger at the current rate.
Seeing as how you are paying any money for zero bitcoin (because its a scam), that renders the price of each bitcoin $Infinity. So no, its not more profitable.
But I'm wondering if anyone bought wallets from them?
People may have bought random wallets before but they are always worth zero bitcoins. Sometimes they are real wallets but encrypted with a password, or else corrupted, or else have a zero balance.
Are there such people here on the forum?
No, and if somebody contacts you saying they will sell you a wallet, they are a scammer.