I am the developer of that bot. I've fixed the issue and the updated version will be available in a few days after some more testing is done.
Facebook FriendAdder Pro (FFAP) may help you to solve the problem. Have a try with the testing verison.
Facebook FriendAdder Pro and Facebook Blaster pro only scrapes comments, including those of spammers and other IMers. Plus neither are free as far as am aware. My bot lets you scrape likers, group members etc. Plus scrape multiple pages in one go.
Facebook FriendAdder Pro can gather friends with keywords from targeted pages/groups/events/friends list, but not from comments.