I was a treasurer of a very small non-profit for three years. One day it was decided that we needed a credit card to be able to book airplane tickets for contractors. They had to fly to Oahu (usually from California) and they'd usually spend several hundred dollars of their own money before I'd catch up with them to reimburse their airfare expenses. The non-profit board thought that it'd be easier to buy their airline ticket on our credit card.
Our bank was delighted to set us up with a corporate account until I realized that I was personally liable. I deferred to the board and it turned out that none of them wanted to be liable either.
Another exceptionally trusting board member volunteered to arrange the contractor travel on her credit card. (She was motivated by her CC's cash-back program.) Although the CC part went fine, she ended up being a one-woman travel agency for all of these contractors. The hassle was far worse than the putative benefits.
This is my main concern. My wife and I have a perfect credit record and I want to keep it that way. I have always submitted expense reports and receipts and been reimbursed in the past. I consider this a major imposition, but it sounds like it is common practice.
It's also a colossal PITA. I'd avoid taking their card if at all possible. You don't even want to have one, let alone have one and not use it.
Mention of the military's government charge card program still makes me shudder in revulsion. The biggest problem was being required to pay the card balance (or incur interest & fees) before you'd been reimbursed by the military.
A far bigger hassle was the administrative side. Card delinquencies (even for perfectly legitimate issues) were considered inputs to evaluations and fitness reports. 60-day delinquents were special members in the XO's personal-attention club. Everyone with a govt travel card had to attend periodic training. That started as "upon issue" but then became "annual" and eventually "quarterly". A substantial administrative burden was spent parsing the delinquency report and tracking down everyone's reasons why they hadn't paid yet, or submitting proof that they had paid.
Other veterans would be on orders of longer than 30 days. Since they couldn't file a travel claim until they finished their orders, they'd have to file "interim travel claims" every 30 days in order to be reimbursed for the credit-card charges that they were required to pay. This was an even bigger issue with the [-]spooks[/-] special-projects guys who'd disappear at sea for 60-90 days between ports.
Then there was the sailor who retired from the military and didn't turn in his govt travel card. He ran up a multi-thousand spending spree across six states before we figured out what was happening. It's darn hard to transfer a delinquency from the Navy to the DoD's retired pay division. Apparently it's even harder to garnish military retired pay for govt debts. That debt was over two years delinquent before it eventually dropped off our lists.
The corporate side was just as bad as the military side. A shipmate ended up running BofA's data network for a few years in the late 1990s. When they were running the military's credit-card program, he said that at one point they were $66 million delinquent on payments. So maybe Diner's Club has it because no one else wants to touch it.