[bmajz]

I'm subscribed to their email digest. It manages to hook me just about every time with some delightful content. Go figure.

[endriju]

I second that. Every time Quora digest appears in my mailbox it manages to grab my attention for couple of minutes at least.

[jnbiche]

Thirded. I feel like an idiot for it, but I do click and read the Quora digest links in my email. They've got an excellent recommendation system set up for that (SVD?).