Contributor link building

Currently doing a contributor link building campaign on pr4 and pr5 websites. How many is safe? The sites are legitimate and I will be donating to charity in exchange for a link.

Should I do only a handful? 10? 20? 100?

Would it look suspicious and get me penalty? I'm sticking to the anchor text rule of mixing it up to look natural.

Many thanks,

Chris

Just don't use keywords in your anchor texts - neutral phrases like "this site", your site name ("bhw") or just naked anchors will do. Google tends to penaltize keyworded links.

Add extra words to your anchor text if its the same keyword over and over you may as well not do it.