I swear they were around longer than since '98. I remember submitting websites back in the day and while there was rarely ever traffic from it, it was a great source of SEO power.
As we moved into the 2010+, their SEO influence was less and less and really for the past couple of years, they've been a non-factor.
It's been an interesting journey for them, and I'm surprised someone like Verizon didn't pick it up (in addition to their Yahoo acquisition).
All good things must come to an end.