* Users signs up to OSPatreon, downloads OSPatreon app that creates ospatreon directory in $HOME/.local/share/ or other operating system appropriate location, then creates a cronjob (or whatever) to rerun after one month
* Open Source projects that want in add a snippet of code that, when the application closes, writes the amount of time the application ran to $HOME/.local/share/ospatreon/
* At the end of the month the OSPatreon window pops up, shows the user a list of ospatreon projects the user has used, sorted by decreasing total time, lets user select how much to donate and the share each application gets (default: proportional to time the app was used)
* You collect money from the user, pocket some percentage, distribute the rest to OS projects.
Startup name: Fosstreon.