system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: This whole Inkjet Scam people keep mentioning.
gpt
Have you ever bought razors? A new Gillette razor would cost you about 12 dollars. But the replacement blades (or whatever you want to call them) cost you around 26. 

The same goes with Inkjet printers. It's very common for companies to sell a base product for fairly cheap and make serious profits on supplementary products. The printer itself can be sold for relatively cheap but the replacement cartridges will start to cost you a fortune.

You'll see it in video games as well. Lots of games are becoming "Free To Play" and then the company will sell you hats as a way of making profits.