It is effective immediately. There is a full FAQ here:
https://help.github.com/en/github/getting-started-with-githu... Essentially, "Pro" = Team - the only difference is whether it is an individual account or an organizational account. We'll work to clarify this on the site.
No, there has not been any change to the data pack pricing for LFS data.
Glad this will help you continue building on GitHub!