I don't have any meaningful data to estimate. Sublimetext is used in countless videos/webcasts, some of them by Google or Microsoft.
A quick google search brings the post [http://blog.leanpub.com/2014/01/leanpub-ebook-sales-guest-po...] with sales numbers of a book about Sublime text I never even heard of. 1000 sales of a book about a text editor! My best guess would be that the text editor itself sold about a couple orders of magnitude more copies.
A quick google search brings the post [http://blog.leanpub.com/2014/01/leanpub-ebook-sales-guest-po...] with sales numbers of a book about Sublime text I never even heard of. 1000 sales of a book about a text editor! My best guess would be that the text editor itself sold about a couple orders of magnitude more copies.