18.Do I really want this?

The most important element when you buy something is TRUST.
If you can truly trust the person in front of you, there’s a higher chance you’ll buy their product.

In order to create that TRUST, FAMILIARITY takes a HUGE role. And in order to have familiarity, CONSTANT CONTACT is required. It is said that you start to become familiar with a person after the 28th contact.

That is why there are so many people saying to post daily.