Here's an example of what one could do building off a platform like Column:
I previously worked at Center (https://getcenter.com), which after a few pivots, landed on offering expense management and analytics software to businesses. They partner with a vendor (not Column) to issue credit cards.
Center gets a realtime feed of card activity into their system to properly categorize the spend based on various signals or rules, which may, for example, prompt employee to attach a receipt. They focus on companies with decent T+E spend because they get the card interchange fees — that's the biz model: earn money from the card spend / merchant fees (as opposed to competitors such as Expensify that charge per user/card/report/etc).
And for the business using Center cards, they get nice software, instant visibility into spend, spending controls, et al, all at no cost to them. I don't mean to make this an ad for Center (I have zero financial stake in the company), just illustrating what you could do atop a platform like Column based on this specific example I worked closely on.
According to Column, their credit card service remits 100% of the interchange fee to the developer company, so you could build any number of services to enhance this data and service.