These kinds of statements are not unusual.
It is interesting and something to follow.. Source - 10-Q [sec.gov]
"Our principal competitor, Overture Services, was issued a patent on July 31, 2001 regarding a system and method for influencing a position on a search
result list generated by a computer network search engine. Prior to being issued the patent, Overture Services advised us of the pending patent application with respect to our current bid-for-position business model, but refused to provide to us the details of the application. Additionally, Overture Services has
announced it acquired an issued patent that may apply to our current bid-for-position business model. If the patents held by Overture Services interfere or prevent us from using the bid-for-position business model, our
business, prospects, financial condition and results of operations could be materially and adversely affected. Moreover, although Overture Services has indicated that it will monitor our activities, they have not commenced or threatened to commence any legal action against us. If we are required to participate in litigation we may not have the resources to fund the required litigation costs, which may adversely affect our business, prospects, financial condition and results of operations.
In the event that Overture Services's patents are found to be applicable to our current business model, we may be required to obtain a license to the covered intellectual property or substantially revise our business model in order to continue operations. We can offer no assurance that a license would be available on acceptable terms or at all, or that we will be able to revise our business model economically, efficiently or at all."