On the first load the animation doesn't seem to be loading quickly enough to seem responsive. If you load the page and don't move the mouse or anything the animation never triggers. However if you leave the page, scroll, etc it triggers.

The homepage causes more questions than it answers for me. For example they mention the first month is free, yet mention no fees. I'm assuming the fees are the Stripe processing fees, but there isn't any information on those either.

I'm pretty sure this isn't possible with the current set of API's unfortunately. Last I looked you are only allowed to send text.