Defender stack and SEO

On my main website, I use the Defender stack to prevent copying of text. Although for SEO my main site normally appears amongst the top 5 on search results, I’m wondering whether Google would include more than the usual 2 or 3 links that I get if I were to stop using Defender. (This particular site has over 500 pages, including 2 blogs. I am writing the content for two more sites (both of which are also likely to straight into the top 5) and I don’t want to waste time defending content if that would prejudice chances of random search results being successful.

What do you think?