I'm taking it you're basing your opinions on the way he answered the question, not the answer itself, right?
The way I'd have answered it to match the tone of every other thing he'd said goes a little something like this:
"You know, it's a fair question. Obviously, I believe the answer is yes.
We're still learning a lot about how to scale this business and educate new partners. We could have done a better job in some cases, and I think that's what you're seeing when people are frustrated by us online.
We're working with our merchants to understand what they need to make sure everyone – both our customers and our merchants – gets a great deal."
"Yes, our company is not just sustainable but is set for a new period growth. Our team has worked hard to get a foothold in the market and our next iterations on our product are going to be twice as awesome. stay tuned."
which is also a bullshit dodge and a deflection, but its a way of doing it with grace and style, and even potentially allowing for the audience to believe they might be capable of fixing a broken business model with some innovation and hard work.