[okprod]

even if that means a chunk of legitimate mail gets marked as spam

Obviously a personal anecdote, but I signed up for Gmail close to when it first came out, and I don't think I've ever had a legitimate piece of mail marked as spam.

I remember people clamoring to sign up for Gmail because it was the new thing, it had the counter that kept going up with "a lot" of storage space, etc. Folks were even paying others for a Gmail invite.