Subject: Clarification on Payment Timing After First Sale in 2021

Not sure why you mentioned eBay. There doesn’t seem to be a “delay”. It appears that 45 days have not elapsed since your first sale, unless it occurred before the beginning of this 12 week activity graph. Here are Adobe’s payment terms:
Requesting payments at Adobe Stock

What does eBay have to do with Adobe Stock? 😕

They’re two entirely different companies. 

Getting paid from Adobe Stock is fully described in your Contributor User Guide below.

https://helpx.adobe.com/stock/contributor/help/getting-paid.html

Hope that helps.