From someone who's worked in the business travel industry - more than you think. Business travelers are a disproportionate amount of airline revenue (possibly over 50%+ of revenue while being around 10-20% of passengers). Those who are doing the same trip over and over again probably don't care, but salespeople who are doing different trips every week get some value out of this kind of thing. There have been piles of startups trying to solve this (and failing).

There's not a ton of money in skimming commissions off of flights (probably < 1%), but there is if you can attach a hotel booking to it (upwards of 10%), so if you can become the preferred vendor for a business traveler, there's money to be made.