Our OC management has also told us that they cannot purchase goods or pay accounts with a credit card. OC management companies (well ours at least) need to be invoiced and then issue a cheque.
So I suspect the OC manager cannot make on-line purchases if the on-line supplier requires a credit card (as most on-line suppliers do).
We get around this, by using an owner’s credit card and then forwarding the paid invoice to the OC manager. The OC manager then sends a cheque to the owner (within days in our case). If you have a 30 days interest free card, that can work. But so far these have always been for fairly small purchases.
Perhaps 3 owners purchase one machine each? And if that’s unacceptable you just have to pay more and have the OC invoiced.