What is the amount of data you can upload to your account, and if needed how do you increase that? I'm sure there is plenty of room for tons of images just want to be sure.
Mentor: All of the above, plus when Roll20 launches you'll receive a "Mentor" account instead of a normal account, which gives you increased upload storage capacity for your custom art uploads. In addition, even after the site has launched you'll continue to receive access to a "development" version of the site where you'll have access to new features before everyone else. Credited on the website as "Mentor."