Prod makes money, just not much (yet).
For now, Prod's only source of revenue is affiliate links, and though we might find some others in the future.
Prod will never: show ads, sell your data, bug you to upgrade, or annoy you.
Affiliate links appear throughout this website, and to a lesser extent the app.
Clicking on one of these links will send you to a product, usually a book. If you choose to buy one of these products, Prod will receive a small percentage of the profits.
Prod doesn't have a special deal with any of these products, or any vested interest other than the money made if you buy them.
If there's a better product that doesn't earn Prod any money a link to that product will be displayed instead.