Too much text - I would not read this beyond the first paragraph.

Try:
- splitting up chunks of text with dot points and separate headings
- Add emojis
- Dot points are too wordy - for example instead of "Get a shout-out on our Twitter account to over 7,000 developers" you could write "📣 Twitter shoutout to 7k devs" and "The majority of our audience is based in the US and the UK" could be replaced with "87% US and UK users"
- Testimonial(s) under a separate heading

I like it. A bit long, yes, but I like the message.

I'd agree with the previous commenters that it probably could do well with some brevity :)