Ask HN: What would you do? Unfinished app gets 20+ signups a month

Hello HN, I'm a marketing guy/project manager and a couple years ago I built a note taking app with a contract developer. I had to abandon the project as the developer left, budget went dry and life required other commitments. Over this time I've been using it for myself, but a couple months ago I started getting some signups. It's a collaborative note taking app so it's got some sharing features that are driving the sign ups. It's free to use and I did build a revenue model into the app but it needs quite a bit more work before anyone would pay for the service. Currently, I'm still sans developer with no more cash to put into the project and I'm at a crossroads because the more I market the product the more I think a bigger team will adsorb my ideas and make a much better app. I think I have a great name, a great domain and it's web based so it works on desktop and mobile. I also have a ruff outline of features I would like to add but I'm just not finding a developer that doesn't want cash up front. What would you do? Best,