Originally Posted by pterostyrax
Wrong. I get exactly 8 hits, with only one post having any relevance to my original question.

Odd. I got 151 hits. Here are my search results:
Search results for "companion fares"
Here is
another search with 500 hits.
I didn't look at all of them, but more than one dealt with your original question. I spent about 5 minutes, and it appears that Royal Bank has companion fare certs, and that the Delta affinity card does also. I'm sure that a more thorough perusing would turn up a lot more.
Hope this helps.