search engines get paid to direct users to for profit sites?

Do you think it’s bad if search engines start receiving revenue for traffic they direct towards other for-profit sites? I’m not entirely sure I understand this article about the Google/Reed Elsevier talks. I also wonder what this means for Scirus which, by its own account, was giving Google a run for its money.

Many scientists post their research on university websites, which can be accessed free of charge. Google directs its users to Reed’s sites, but Reed does not now receive a share of the revenue generated by the traffic. Google has similar revenue-sharing arrangements with other companies, but a deal with Reed would be one of the biggest of its kind. [shelf]