If you negotiate a cell phone contract with a mobile phone provider today, they often won't give you anything in writing until you have agreed in principle (preferably over the phone and recorded). That's how much they "stand" behind your product. There is no trial period anyway and you are forced to sign for 24 months with automatic renewal. New customers get a discount, regular customers are left empty-handed.
Don't tie your customers to your company with long contracts, but score points with quality. This way, the customer will be happy to stay with you and recommend you to others.
How bad do you have to think brazil telegram screening your own product is to capture and gag your "customers" so much that they don't go to the competition? Show that there is another way: non-binding test phases, transparent conditions and the option to switch at any time. Of course, the quality has to be right, but how good is the " recommendation " of a customer who has long wanted to switch but has to keep paying for months? Exactly, pretty bad.
Here again, it is worth letting the customer go just to avoid the discussion. And even if the conning of mobile phone providers, fitness studios, etc. would bring in more sales in the short term (which I strongly doubt), it is simply dishonest. Remaining decent has always been a bit more expensive, but you never have to cross the street when you meet a former customer. There is no price to compare that with.
You'll notice that good sales tips don't have to be expensive or complicated, but rather follow common sense and the feeling of how you would like to be treated as a customer. In communication science, we talk about a shift away from the sender's perspective to a receiver's perspective. Or in plain English: The talent to put yourself in a customer's shoes is worth its weight in gold for every salesperson.