To quote this answer:
This is similar to the situation with the Ferengi in Star Trek. Due to their willingness to trade with anyone - they even trade with the Dominion - and their expressed desire to maintain neutrality, it makes more sense for the various powers in the Alpha Quadrant to maintain Ferenginar as an independent state, rather than to destroy or conquer it.
Given their willingness to trade items and information while maintaining neutrality, has a Ferengi ever worked for Section 31?
It makes sense if you think about it, you trade with targets or enemies of S31 and gather information or technology, and no one would suspect a species of comical greedy traders of espionage.
Your biggest concern would be that the target doesn't offer more Latinum to double cross you.
I'm including all canon and non-canon material (video games, books, etc..)