Percy.io's Invite Request system is tied to github.

How is that not a problem imposed by Percy?

I'd feel more comfortable having a different mechanism to request an invite.

While the permissions don't grant Code Access, it does ask to read Organization and Team membership. I'd expose data for every member of my companies github organization to Percy, JUST for an invite.

Percy is a tool that integrates with Github to set build status on Github pull requests. Of course it needs to tie into Github.

100 %.

However:

Sign up for Service != Sign up for Invite.

Indeed, but it seems reasonable to me that they wouldn't need to make two systems for storing user information.

You can sign up for the mailing list instead: https://percy.io/#updates

And yes it's a GitHub limitation, we request some limited readonly access and no code access (we don't need it).