If you are looking to start making money online, both URL Shorteners and Affiliate Marketing allow you to generate passive income simply by sharing links. Here is how they compare:
URL shorteners pay you based on the volume of clicks you send. Users do not need to buy anything for you to get paid; they just need to view the transitional advertisement.
Affiliate marketing pays you commissions when a user actually buys a product through your link. While the earnings per sale are high, it is much harder to get a sale than a click.