Hi Alan,
The metadata for each peice of content describes the license under which the submitter has choosen to release it. Obviously, consumers of the data are expected to abide by those terms, although ADL leaves enforcement up to the contributor. We currently don't have any limits or restrictions on the use of the server, although I should note that we are calling the existing website and API the "Demo" installation. If server load or bandwidth becomes an issue, we'll contact the owner of the API key used to work out an agreement. We are not in the business of providing web hosting, so long term, if you need these services, I recommend that you stand up an instance of the 3DR software on your own web server. We'll be releasing the system open source, and will provide tools and instructions to stand up your own instance. Please contact me privately if this would be of interest to you.
-Rob C