FYI, Alamy replied saying that these photos have been used for internal testing only.
Alamy's always good about replying.
For as long as they've been in business, and given they allow downloads for customers without triggering a sale (that waits until the customer "reports" it as used), why would multiple, test, no-cost sales show up in a contributor account?
You have test accounts or systems for such things - something that doesn't interrupt the business while you work out new software or products. And doesn't waste support people's time answering questions about what this is.