If you mean just for testing the programs, just tell them to download what they want from adobe.com, and during that process, they will have to register with Adobe to create a free Cloud account, which in turn gives them access to all available trials.
check the free membership and trials section in this document: http://www.adobe.com/products/creativecloud/faq.html
Trial? No. VIP accounts manage paid licenses.
You can assign paid licenses. More in: http://helpx.adobe.com/creative-cloud/help/manage-creative-cloud-teams-membership.html
I guess you could assign licenses and then remove them from the user, but that would be a weird way of going about it.
Indeed that would be a weird way. We'll figure it out on Adobe.com. Thank you Luis