The key to advertising on the wireless Web is to develop solutions that are unobtrusive to users while providing value to advertisers. Advertising solutions need to be developed carefully in order to ensure that the subscriber base does not suffer from an overload of misplaced advertisements or spammed content via the messaging service. Advertising will help service providers offer differentiated levels of service with free, advertising-supported Web access at the low-end and premium (paid) services at the high-end that are absent of advertisements.”]
Source: https://www.csoonline.com/article/2112939/stumbling-toward-advertising.html