This is pretty cool, but it seems like it doesn't store data for multiple visits. Say I land via Google yesterday, come back today via HN, then sign up. I'd like to know all that.
Just some observations I have, hope they help (I'm on mobile if that matters and I just subscribed today).
#1 - your connection rate seems horribly low. I'm guessing it's all on the originator's side. If so, that doesn't really give me confidence in the service nor in the opportunities in the newsletter.
#2 - your landing page could be way better IMO. There's very little text about what I am signing up for, and if I hadn't come with the blog or HN, I wouldn't have signed up.
First off, you should have 2 calls to action, one for devs (or people who want to sign up to the newsletter) and one for people with suggestions. I read the page and if I had an opportunity, all I can do is sign up to the newsletter, then wait for the next email.
There's very little info on what happens. I signed up, now what. It says you made money in your blog, how? I don't see anything about paying on the main page.
I could go on, but I think you get it. Talk more about the process. People coming from HN and ProductHunt probably get the idea, but organic visitors won't, and you probably can't sustain this model without some organic.
#3 - I signed up today, any chance I can get today's email?
Not trying to be a jerk, just trying to help you out.
Can I ask what you ran into? I'm thinking about starting a side project with .Net Core for my API and React for my front end. I'm wondering if it's even worth it to use Core at this point or switch to Go or Node.