Are there any successful co domain names?
 

Have there been any big sites that are .co?
I have some .co domain names I bought and did nothing with. They're up for renewal and i dont know if I should bother renewing them.

Nope, no big site on .co , let them drop

Do you know if they pick up typo traffic at higher levels?

The Internet never forgets ...

here you can find the list of most popular .co sites:

https://domaintyper.com/top-websites...with-co-domain

the most known is Vine.co , mobile app, owned by Twitter

http://en.wikipedia.org/wiki/Vine_(service)