It took a lot longer than I wanted to build the mvp. Originally I was going to just email a list of startups that got funding along with the founders contact info each month to customers, but it didn't seem like much more work to just add searching and filtering and allow customers to export a list of leads themselves after subscribing.
Well with this feature creep the MVP took a few months longer, but the entire business is mostly automated now.
I tested the idea via a substack and successfully got 2 customers in a weekend of promoting via various facebook groups. I decided this was enough traction to spend a few more months building the product.
I refunded those original customers and have kept them updated so I'm hoping they decide to subscribe again (and I've provided them with a 50% coupon code).