So I'm new to the whole autoblogging thing and so far I have about 300 autoblogs. I'm using some plugins to help me build backlinks but ever since I started using them I started noticing comments on my blogs saying thanks for the info...etc but under their name is a plugged URL to their website. Essentially they are backlinks that others are creating on my site to benefit themselves right? Do they benefit me too? Should I delete them?