It looks like the occasion is the 30th anniversary of Bare Bones Software (the company): <https://www.barebones.com/company/>. Perhaps the original submitter mistakenly interpreted the "30th Anniversary special pricing” text as applying to the BBEdit program itself.
The new title now seems inaccurate, or not reflecting the intention, given that, and given that the linked page says "30th Anniversary special pricing! Use the coupon code “BBEDIT30” at checkout to get BBEdit for US$30 for a limited time."
The situation is confusing because of a little bit of history.
BBEdit was 30 years old last year because it really was around in 1992, but it wasn’t commercially available. It was basically Rich Siegel and his friends. 1993 is when it became commercially available at version 2.5.
