Out of curiosity, are you referring to how ANX only has a few airline site choices, such as ANA or AC?

I know that earlier on, many people have the misconception that because there are only 6 or 7 programs listed, than ANX only searches on 6 or 7 carriers. But in reality, many of those airline site choices actually cover the entire alliance, so ANX does have coverage for all 27+ Star Alliance and all 12+ Oneworld airlines.

For example, AC has coverage for the entire Star Alliance, so if you search using AC, you are going to get many Star Alliance carriers results, in addition to AC's own flights.