Simply put, this is an offer of $1500 credit of some small obscure VPS provider for 50% of its value. Even worse, the credit is already redeemed in an account so you have to buy someone else's account which most probably violates the ToS and if they find out they may terminate the account.

Anybody can buy on this forum unredeemed credits for AWS and Google Cloud for 10% or less, opening an account is always free.