What is the affect of this on your Google ranking? Just curious as to how much of your content they are altering. If not much then could it cause your site to b

What is the affect of this on your Google ranking? Just curious as to how much of your content they are altering. If not much then could it cause your site to be ranked lower due to duplicated content? Just curious on this. I think there are tools that will look for plagarised content online