Hi there,
As of right now I decided not to allow third-party sites in the library. It would be very difficult/impossible to ensure quality/security of these sites, and since people are using a GP feature to import them, it would reflect badly on us.
However, I’m looking at a couple of options, including:
a) Adding a notice in the library if a site isn’t directly from us, warning the user to only install it if they trust the source.
b) Manually vetting each author to make sure the sites are quality and secure.
c) A combination of a+b.