I believe search engines should not allow advertisers to purchase trademark keywords, except if allowed by the trademark owner. However, what do you think of this peculiar scenario:
An advertiser purchases 5,000 keywords - all of them are company names
The purpose is to advertise trading strategies for each individual stock
The 5,000 text ads look like "Predicting Microsoft Stock Price - Check our stock picking and trading strategies... etc."
Should this type of ad be banned, because it involves trademark keywords?
In my understanding, it is a larger legal issue than search optimisation & very specific to demographic.may refer to trade mark & protection of Intellect property law.
The advertiser is making good use of dynamic insertion, and, provided that the landing page is relevant to the ad text, the click-through rates and quality scores (if applicable) should be sufficient for it to survive.
I think this issue is more debatable: Should a company like Allstate be allowed to advertise on the search term GEICO?