Not much? I did exactly this when I worked on a really popular P2P file sharing client (at one point estimated to be installed on >15% of all PCs worldwide). It

Not much? I did exactly this when I worked on a really popular P2P file sharing client (at one point estimated to be installed on >15% of all PCs worldwide). It even improved our actual installs, but that is probably about just using an ultralight weight installer rather than having a tracking ID integrated into it. It literally took me a week. Granted, things were really fast and loose back then. It would probably take me 2 years and a team of engineers to do a similar thing at my current FANG job.