Here's our blog post about launching: https://medium.com/@signupsumo/from-napkin-to-shipped-in-7-d...
Also checkout what we have planned next on our Assembly page: https://assembly.com/signupsumo
Also, how are you going to manage going from a usage-based (Clearbit is $99 for 12,500 queries) to time-based ($9/mo). Are you just hoping people won't use up all the queries, or are you going to throttle high usage users?
The pricing issue is one I've thought about a lot. We'll have to see how the first few months go. At the end of the day we'll probably be able to change either our free plan or upgraded plan limits to cover that $99. I'll write a blog post about this once I have more info though.