This is called "market segmentation".<p>If you haven't read this, Joel Spolsky had an excellent explanation of those techniques back in 2004:
<a href="https://www.joelonsoftware.com/2004/12/15/camels-and-rubber-duckies/" rel="nofollow">https://www.joelonsoftware.com/2004/12/15/camels-and-rubber-...</a>