Curious to learn more about this, re pricing limits in today's corporate world.

What do most managers have access to on their corp card in terms of spend limits, without needing to get VP/finance approval for their purchase?

In my mind, I had the limit as $500/month (potentially from some old readings on the subject).

There is a whole non-corporate world of SMBs that employ 30 or 100 people total. Those businesses have no VPs or corporate cards, but they still have problems and are willing to pay good money for solutions. Family businesses in any industry, law offices, marketing agencies, boutique hedge funds/pe, etc.

Corporate approval for a 10k purchase doesn't need to be complicated either. As a software vendor it helps to have a web page/email with all the relevant info intended to be forwarded to accounts payable.