I searched for ".NET" and got mostly results about economics, climate and a "Music Help Desk" whatever that is.
I searched for JavaScript and got results from newsletters I've never heard of that have less than 10 published issues.
Googling for both things returns dozens of results for both search terms.
Did you use the topic search for Javascript? I get quite a lot of relevant results. Note that we only show the top 6 for free users.
In the search results there's an "Active" column that indicates whether a newsletter has published an issue within the last 45 days.
Then when you click into a newsletter it will show you the "Founded" date (when it started) and the dates for the most recent issues.
Can I edit my newsletter entry? Secondly, it's SUPER expensive.
What you've built is very helpful because, as I'm sure you can see in your data, most newsletters have low digits subscribers and looking for inexpensive ways to grow. AKA cross-promotions.
So your product is an expensive gateway to try inexpensive techniques for growth.
The current pricing is the cheapest it will ever be! I'm aiming this at businesses and agencies. I have a similar and quite successful app for podcasts that starts at $99/mo.
That seems like a lot of data to index, well, not a lot of data.