We have a site allowing visitors to comment at the end of each page. We don't enable links to be added in comments at present. But sometimes, when we answer some questions, we paste our link address coz some questions are related to our business. We just paste our url address but not a link which is not convenient for users to reach.
Now we want to link our own page from comments with our url or page keywords. Only our link can be linked and only from comment answers posted by ourselves. Users can not post link in comments. My question is: Will it be a problem to link our site with keywords or url from comments part? Will google think this as comment spam?