Good insights. I prefer to use similarweb.com & alexa.com and assess potential partners based on their recent web traffic not just on their instagram following. Can also distinguish how the retailer fares in a particular geography.
Pretty excited for when Forever21 comes on board, as announced at AGM. https://www.similarweb.com/website/forever21.com
Fashionnova would also be a great addition as you said, a few afterpay social media comments & app reviews mentioning them.
https://www.similarweb.com/website/fashionnova.com