IMHO and if it was my site, I would get rid of everything that give the remote hint that you are participating in link exchanges.
Google wants to rank sites where that naturally should be based on a natural link popularity. They do not want to rank sites un-naturally higher than they deserve to be - You are sending some very poor 'quality signals' to Google re your link practices.
Also the link to world property links on the home is a bit dodgey - they meet some of the defnitions of being a link farm (eg they require a link back)...(they are not banned though) - personally, I would not take the risk of being associated with them as Google recommend against it.
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We rely (too heavily) on Google as our primary source of attracting business and changes affect us greatly.
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Any business model that depends on free advertising from a search engine, needs to change the business model.
Google have become much more sophisticated in their analysis of links - its not totally clear what is involved, but it al boils down to, how much of a risk to you want to take?
CBP