Anycast but for egress

[Vimal <j.vimal () gmail com>]

(Unsure if this is the right forum to ask this question, but here goes:)

> From what I understand, IP Anycast can be used to steer traffic into a
server that's close to the client.

I am curious if anyone here has/encountered a setup where they use anycast
IP on their gateways... to have a predictable egress IP for their traffic,
regardless of where they are located?

For example, a search engine crawler could in principle have the same IP
advertised all over the world, but it looks like they don't...  I wonder
why?

-- 
Vimal