Submit your program to affiliate directories.
You’ll want to get your program listed in as many of the affiliate program directories as possible, especially the “popular” ones such as
https://www.affiversemedia.com/.
This can be a tedious and time-consuming task, but it’s a one-time chore that gets you long-term exposure, so it’s definitely worth doing. You can find a lot more directories by simply searching for “affiliate program directories” at Google.