Not sure how you could not be the asshole in that scenario.

If you’re sitting down at a table having a meal with a waiter who is taking your order and bringing you your food then yes, 15-20% tip is strongly encouraged. If you’re going into a place where you order your food at a counter and pick it up yourself to take to your table or back to your home then tipping is not necessary.

I don’t think they ever expected to get IPO status. That’s the only reason why they’re moving forward with this new API policy.