If you plan on doing any type of MS they will shut you down in a heartbeat.
Considering for a business that wants to keep things relatively simple.Are you able to setup business account with the personal cards like Freedom Unlimited or Citi DC?
If you value amex above 1.31 than its the same as amex blue for business without the 100k requirement.
... Except one has a 50k limit, and one doesn't.