If you use the Google link: operator, then you know that it is useless. The purpose of the link: operator is to get some of the backlinks to a site that Google knows about. Here is my website’s results. All this link: operator does is show a small useless random sample of all the backlinks to a site. Often that sample shows nothing. It is a meaningless finding of no consequences what is in that sample. The operator is not broken, it is set up that way, so do not try to analyze what you see. If you need to know the links to a website, the use your Google Webmaster Tools or a 3rd party tool. Spamming is not going to increase the links in this Google link: operator!