While everything this guy says is largely true - I have after all had purchase proposals rounded up to the nearest $100k ( it wasn't close... ), But likewise it's often true that that $500-1000 credit card is only held by one person in a given team, and there are already many competing monthly charges on it, and it's also said manager's "get out of jail free card" for just throwing money at small problems that come up, without having to talk to their manager. That's an emotional requirement as much as anything, but it's linked to whether said manager can appear competent to their 1-up.. so if you think that $1000 card has more that $250 available for all reoccurring expenses, you may need to reconsider.
And you might, justifiably, decide that's a reasonable customer selection filter, because no one wants a customer that behaves like a big enterprise but pays like consumer.
But we're not like that, honest - I just want your X for me and the 3 people in the team it'd help, you'll probably never hear from us otherwise. Truly! Come on, we believed your marketing brochure.. meet us half way?