I've noticed a lot of people asking about card programs. Just wanted to let you know there is an organization, the NAPCP (National Association of Purchasing Card Professionals), that has great information on this topic. You can also subscribe to their website for free. It's napcp.org -- lots of good info and even free webinars. They just had one on mandating corporate card usage. There's another one coming up in September on different liability options (e.g. IBCP, CPBP, etc.) for those who may be interested.
Happy to help @CareBearStare!
Feel free to reach out anytime for insight.