If they were the first organization known as "OpenXY", then maybe they would have a point, but there's a long tradition of open source libraries/standards using this convention that makes this especially aggravating.

Examples I can think of off the top of my head: OpenGL (1992), OpenAL (2003?), OpenCL (2009), OpenCV (2000).

While looking up those dates though, it seems like OpenAL is now under a proprietary license, which annoys me for the same reason OpenAI annoys me.