We're proud to be AGPL. The AGPL license is pretty clearly stated on both the product page and the download page. We were an AGPL licensed project years before we were a "real" company, because we thought that for server-oriented software (RStudio was originally conceived to be server only), it was the license most aligned with the principles of the R project.

It's certainly not our intention to deceive and then submarine our customers, and I sincerely hope that's not what you were implying. IANAL but RStudio users have nothing to fear from the AGPL, as the copyleft provisions are for derivative works of RStudio itself.

If OTOH someone is trying to build an R editor interface for their commercial SaaS data science startup, and want to leverage our code to do it, then yeah--the AGPL is going to apply and if that's a problem then we try to work something out.

(BTW I'm a fan of the work you're doing with Julia!)