Does google penalize for link exchanges? What about 3 way link exchanges? If my site got penalized will the whole domain be penalized or only the homepage? Where can I find a list of factors for which google penalizes a website?
No they don't penalize for doing link exchanges unless it's one way link sales. It's just that you don't get as much benefit from doing link exchanges as compared to if the link is one way pointing to your site naturally just like in link baiting.
They do penalize for some link exchanges, such as link farms or totally unrelated link exchanges. Any penalty your domain gets would affect the entire domain and not just the homepage. For Google rules, refer to the webmaster guidelines on google.com
They don't penalize for link exchanges. If you provide do follow for those sites from your home page means then they will penalize
Link exhanges are not penalized, but are devalued, especially if you belong to a link exchange network. Three way links can be penalized because they are generally grey hat techniques. This is unnatural in Googles eyes and looks like you are trying to disguise your intent.
I think Google do not penalize for Link Exchanges, but Google do penalize for selling links without using nofollow tag. Other things for which google penalize include, using hidden text, duplicate content etc
Google don't penalize for link exchanges. But if you are adding inrelevant links or doing soemthing extra to get traffic.. then google follow you.
How did Google detect that a site is selling links? Can i put in my site links to other sites (not selling links, just real do follow links) without problem? What the rule?
if a bad neighborhood links to you, and you provide a reciprocal link on your site back to the bad neighborhood then expect to get penalized.