"Blue Sky Beta Invite" could refer to an invitation to participate in a beta test of a software or app developed by Blue Sky. Beta testing is a type of software testing that involves releasing a pre-release version of the software to a limited number of users to gather feedback and identify any bugs or issues before the software is released to the general public.
Without more information, it is difficult to determine exactly what software or app the invite is for. If you received such an invite, it is likely that you were chosen as a tester based on your interest or expertise in a particular area related to the software or app. If you are interested in participating, it is important to read any instructions or guidelines provided by Blue Sky carefully and provide feedback as requested to help improve the software or app.