Hi,
Unfortunately, copying your own projects isn't a supported action at this time. This is something that is already on the backlog to address, but we haven't prioritized it yet. I've gone ahead and made a note of your request for this feature.
Related, I'd be curious to learn more about your use case and how you're using Rstudio Cloud. If you are interested in sharing, I'd be happy to arrange a call with our Product Management team if that is of interest to you. Feel free to drop a me a DM if you are interested.
-Andy