Over many years i have learnt that scammers do not refund anyone. This isnt a guarantee that they are not a scammer, but adds weight to their portfolio.
When you see this, it likely means that seller has been suspended for one reason or another.
Most of the time it will pop back up within a hour or so once the seller has fixed what needed fixing… others may not pop back up at all, for more serious issues.
If you dont feel safe using a payment method, no matter how secure someone claims it to be, pass up on the deal.