Are Shopping Directories considered to be Link Farms? and SEO Ranking?

[Tiger Creek]

I own a business online and I've been trying to advertise and do the whole social media thing. Sometimes I submit my URL to shopping directories. On the site that I sell on, we have to meet certain criteria to be listed in Google search and Google product shopping. One of the requirements is that we can't list out URL on too many link farm sites or else Google will push us further back in the search engine results making it harder to find our websites.

So, does anyone know if a shopping directory would be considered a link farm? Like I said, I don't want to list my URL with too many of these directories if they are considered to be link farms because I don't want to hurt my SEO ranking. I've worked too hard to get it to where it is right now. Thanks!

[Chronicle]

Legitimate "shopping directories" do not violate the rules Google uses when identifying link farms. A link farm is defined as:

any group of web sites that all hyperlink to every other site in the group. Although some link farms can be created by hand, most are created through automated programs and services. A link farm is a form of spamming the index of a search engine (sometimes called spamdexing or spamexing). Other link exchange systems are designed to allow individual websites to selectively exchange links with other relevant websites and are not considered a form of spamdexing.
Search engines require ways to confirm page relevancy. A known method is to examine for one-way links coming directly from relevant websites. The process of building links should not be confused with being listed on link farms, as the latter requires reciprocal return links, which often renders the overall backlink advantage useless. This is due to oscillation, causing confusion over which is the vendor site and which is the promoting site.