FB promotion fraud

I just tried promoting a FB post and got well over 100 likes and loves in the first 2 days, but when I checked who the people were that liked or commented, most of them hadn’t posted anything on their site for over a year. I am wondering if most of them are hacked sites. Now I am afraid to invite any of them to be followers. What do you think I should do now? Chalk it up as a bad experience? Sift through the names and try to find some active ones? Contact FB? I just don’t know what to do. My whole point in upping the post was to get more followers since I am still under 100.