I just read this on my Blogger account and am showing this to my readers and followers to keep in mind. I guess what they are trying to do is each person have their own Google account in order to be able to follow blogs etc, at least that's what I have understood.
So one reason we will see our followers getting fewer in number is because they take out those who don't have a Google account. Also those of you who don't have a Google account won't be able to read my blog or others on Blogger. So if you want to continue being able to read my blog and others you will have to register on Google. Thanks.