Open source is not a very useful term. Grayjay isn’t free and libre software because it restricts commercial use, and it is definitely source available software. Whether that makes it open source depends on who you ask, and no, OSI is not the undisputed arbiter of all things open source just because they say so.
Griping because someone is using a different definition of open source than you do when they are being very clear about what exactly their license allows is not productive.