ByeAds is an ad blocker that uses the hosts file that contains a list of mappings between hostnames and IP addresses. When applications requests ads, that request is directed to 127.0.0.1 which does......nothing, absolutely nothing. There are options to run a web server to respond to blocked hostnames and to direct requests to the IP address of your choosing. You can download hosts files from the app but it is possible to use your own and to add certain sites to the white- and black-lists.