I've noticed some companies have it explicitly stated that we can't use their company name in keywords in search terms (in adwords for example). But some companies don't have that written anywhere (in some cases no conditions at all....does that mean we can use their name in search terms?) For example some companies explicitly forbid it (godaddy) and while other don't say anything about it Cogen anti-virus
If there's nothing in the Keyword Link, nothing in the program description, and nothing in the Special Terms, then you should be fine. Most likely though, the advertiser does not have much brand recognition if they don't have a search policy. When in doubt, email the advertiser.