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!
Due to the on-going Pandemic, I've been trying to cut business costs left and right. Github Team was one of those I wanted to cut but it's also so important that I couldn't decide easily. So thanks again for the change. Much appreciated!