Well the answer is Yes and No.
Yes. Because you can post them on your blog and you can make money from adsense or affiliate marketing.
No. Because I believe the primary purpose of blogs is to provide information to your visitors. If you have good and unique content, there will be more followers to your blog, you will eventually make much more money.
However if you have good collection of PLR articles, then you can modify them to make them useful and enjoy the trust of your followers.