The featured projects and tutors on the home page could be linked so you can find out more about them without signing up.
As a prospective teacher: How do I get paid? How often? What cut does Teachity take?
As a prospective student: How do I pay (credit card, I assume)? What happens if I don't like my tutor (refund policy, etc.)?
Payments are all done through Stripe Connect. Right now Teachity isn't taking a cut, but if the site ends up getting enough users then I'll start experimenting with pricing... as a comp, I think airbnb is 6-12%, elance is ~9% of each transaction.
Refunds are tricky. Everything is run through Stripe so I can't directly issue refunds above Teachity's cut. If people have a really horrible experience/no-show tutor I can ban the tutor and give refunds out of my own pocket although that wouldn't be sustainable. I'm working on a feedback system, so hopefully that will head off most problems... although you need enough reviews for that to be effective in the first place.
Would love to help clarify things, feel free to email me at amber@stripe.com as well. (: