Ann: Sezzle Reports Record First Quarter Results, page-35

Yeah mate, Instagram has been pretty good for monitoring some of their new and/or larger retailers. Each week they post a story of 5 new stores and the pattern I've seen lately is 2 x 500k+ followers, 2 x approx. 100k+ and then 1 smaller one. Can vary sometimes but definitely noticed an increase in the size of some of the stores coming on board.

Another way to check is look up Google Trends, set it to 7 days - often there will be the name of a store that has huge % increase and is one you haven't seen in past days or weeks (i.e. not one of their existing larger retailers). If you look the store up on Instagram or their website, often they've just been on-boarded.