How many sites may I run using my WPMUDEV membership?

This may be a silly question, but how many WordPress installs can I run with using my WPMUDEV membership? I mean, can I install the WPMUDEV dashboard on all of my sites and use it to download the member-only plugins and themes?

I have several domains, but only a couple that are actually used. On the others, I like to install WordPress and then try out new plugins and themes, leaning more about WordPress. Then I often delete them and start all over from scratch.

I notice that each time I download a plugin or anything, my activity shows this in my WPMUDEV profile. I'd hate to be downloading the same plugin for multiple sites, and then have someone ask me, "Hey, what are doing?"

In short, I guess I don't want to abuse my membership.

Thanks,
Kevin