Hi, I'm from Kontera. Placing Kontera and another In Text ad service on the same page is not permitted according to the Kontera TOS. This is in order to allow your in-text ads to perform to their fullest potential. Still, placing Kontera ads alongside any other contextual ad service, text ad, banner, etc. is fully permitted. In fact, it is often advised to do so as a way to maximize your site's revenue potential.