67 upvotes on HN, 50+ subs

So I submitted onsite.fun to HackerNews last week, to unveil my 2 weeks old site.

Here is the result:

67 upvotes
18 comments
3.8K in New Users to the site
50+ new subscribers

What a great experience it was! Enjoying the power of these distribution channels was really interesting and stressful at the same time, as you never know when this could happen! Any advice on how best follow up with the subscribers apart from the initial message?