I then emailed support and asked them what was going on. I got this reply:
> Due to a disproportionate number of fraudulent transactions originating from your bank or card issuer, we can no longer accept payments from this institution. In this case, you will need to use a different credit card or use PayPal in order to make a payment.
My Discover card is issued by Discover themselves; there is no intermediary or third-party involved. Does this mean DigitalOcean no longer accepts any Discover cards? Speculating here, but perhaps Discover themselves or whatever payment processor DigitalOcean uses cut them off from accepting Discover cards?
What gives? Has anyone else seen this?