While it's hard to get confirmed metrics on Stripe given that they're private, it strikes me as unlikely that a 100-person startup would have been Stripe's "main customer" in mid-2015. Analysts estimated their annual revenue to be $450M that year based on a payment volume of $20B, with customers that at that point included Lyft and Slack.
Stripe was in the order of $10B in the previous year and we were above $1B. We were doing well for a small company, can't deny that, but ultimately that's all pocket money when it comes to payments or large companies.
Lyft and Slack were much much smaller back then, also private companies that don't publish any numbers. Not exactly great references at the time.
If you have to learn something from this, it's that Stripe is a long term play, that really needed the capital to sustain and grow the business. The main growth factor by the way is the second-order effect of growing with their customers, and they're very smart to advertise to the HN crowd.
