Yev from Backblaze here -> We've actually done a lot of experimenting and content/SEO marketing has helped us grow and expand quite a bit over the last year. As for the HDD reliability...our software works around HDD failures, so they don't affect is too much, but we do like reporting what we've seen in our environment. Hopefully other companies will do it too.

It'd be better if they put the date on, but I don't see Amazon or Facebook or Google sharing their reliability data. As long as backblaze is more open than the industry standard, I think that's as a good thing regardless of their motives.