It used to be that the salesman had to come to your home, get in your face and convince you to buy whatever they were selling.
Sure there were commercials on TV, but not many because not everybody had a TV of those not a lot of people watched him a lot of TV.
Sales continue to mutate. They called it helpful, and sometimes it was! The salesperson would make an offer, you would disagree or agree. Then the amount of your purchase would change or not. And you'd go on your way.
Go to the office store and buy a pair of paper, now they want you to buy a pen or pencil or a pen and pencil set or a box of pens or more paper, Etc. Again, sometimes helpful, sometimes not.
This trend was also active in the fast food business. Everybody whoever ordered something has heard server say "do you want fries with that" or "would ya like cheese? Its only a dime!"
And then there was coupons. Boy! I don't even want to talk about coupons.
Let's not forget about gym memberships. Some fast talking salesperson would have you sign up. "You'll do great, I can see you've got great bones but just in case, you can CANCEL ANY TIME! Just call this 800 number." Half of the times the 800 number never existed, got changed or disconnected after 2 months or you lost the swatch of paper that had the number on it. Consequently, you're stuck with another month or year depending on the gym membership.
But NOW they get their HOOKS into ya! I think they called it the free trial that morphs into a paid membership that morphs into you forgot you had your paid membership and your account is dead...except for that ALL IMPORTANT FEE they get that you FORGOT ABOUT. It becomes another ubiquitous bill you don't even know is there or think about any longer. THEY KNOW you haven't ordered anything from your account in 2 years! Generally, they don't even send you a notice telling you they're going to make another deduction from your checking account.
There are a lot of holes in the laws defending American citizens against this kind of larceny. And our congress KNOWS about it!