A few weeks back, TechCrunch wrote about how Ramp, a corporate credit card startup with a focus on cost control, had added expense management software on top of its company plastic business. Closing out our piece, I wondered if “cards aren’t de facto commoditized by this point,” given the sheer number of companies that are willing to either underwrite, or supply corporate and consumer plastic. One company in particular agreed with the sentiment, namely Airbase, which we last covered in March when it added $23.5 million to its Series A…