But the very nature of 1099 means you could be working with a variety of clients, and are more likely to receive payment via check or other one-time method, versus direct deposit which is more common for W2 employees. I can't tell you how many one-off gigs i've had, or on/off where they just want to send me a check and thats the last i hear from them for months or ever; i'd get laughed at if i asked for direct deposit. (and did by a long term client: they like writing out checks)
If you want to actually solve this for 1099ers, your going to have to do more than just what works for a subset of users; and supporting checks absolutely needs to be on your roadmap at some point, at minimum. Otherwise... I don't think you really have any sympathy or understanding of the very field that you're trying to solve a problem for.
Totally agree here. We're working on getting some folks running on the current build & making sure it's stable, but we've already identified a couple options for remote check capture to be included when we get to building out native mobile. It's definitely key to serving a large portion of the total market.