That's a fair reason for the AGPL license choice for RStudio. It is a product-like software project after all. My experience with corporate legal is that they are much more wary of GPL software than strictly necessary – hence the warning about AGPL since ease of use != ease of permission. (We've had JuliaBox fire-walled from a few big banks, albeit not for license reasons, but because they don't want private data on the cloud, so it's a familiar issue.) I had a hard time finding any mention of the AGPL on the RStudio site, including some broken links.

Congrats on the release! RStudio pushes the envelope on very many data analytics UI features. Excellent work.