XoloX has made it clear that it will not include any Spyware, Sneakware , or any hidden programs. Not force you to install things you don't choose to and will *remain* free. This point has been hammered pretty good but none-thel-ess always a concern of users and rightfully so with the track records of other p2p clients.

Supporting a program through ads is nothing new and as long as its not too annoying or intrusive , then I think people can remain happy with a client that offers so much and aims to continue to do so.