You clearly have your opinion on the customer base, which you have stated here many times. But I haven't really seen anything to back it up. Your perception seems to be based on certain marketing channels (instagram targeted at younger customers) and photos in company reports, but that doesn't necessarily provide an accurate view.
Take for example the FB page "We Love Afterpay Australia". It has 125k members who are very active and the page is pretty much solely occupied by mums.
In any case - 2 million Australian have used Afterpay in FY18 with an average age of 32. Fact.
