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And no, they currently do not have a program for companies to buy in bulk and resell for others.
What you can do is offer a bundle option yourself. Bypass the EULA.
XenFans has an all in one package that includes configuring the forum structure, permissions, subscriptions, promotions, staff documentation writing, and what not. Included with it all is a xenforo license. We purchase it on behalf of the company - in their name.
That way you don't have to buy it first and sell it later. You pay using your paypal details, but enter their company details - and of course provide them with the purchase details from paypal may they decide in the future to transfer it to another party.
Since it's a bundle package the combination of it all and the upfront pay covers the license price, etc.