The 2nd version I'm working in around my coursework won't have any ads and will be available to buy. I used to use one of those crappy installers to earn some extra cash but people didn't like it and neither did I as sometimes it could also instead bloat. The company I used didn't always check the software they was provided so it HAD to go.
Since then, I decided to just have a 5 second advert. I make nowhere as much money but I'm happy with that as long as I aint bloating up peoples computers.