Just incorporated SurveySays, Inc.
Until now, this project was being subsumed by my umbrella LLC. But I wanted to keep open the possibility of raising funds in the future, and so decided to set this up the "right" way from the get-go.
On that note, I highly recommend Stripe Atlas. Almost effortless to incorporate and it's all embedded with Stripe payments (which is how I process SurveySays payments).