(Uk) Majority audio scam? Help needed thanks.

A user operating a niche Instagram account was contacted by what appears to be the official Majority Audio account, proposing a collaboration where they would send product funds via PayPal for the user to purchase items on Amazon, followed by a review and a bonus payment. The user questions if the process is a scam, particularly concerning PayPal payment reversals and legitimacy of the reimbursement structure.