That's what companies do. They give you something "free" to bait and hook you which then will have you wanting more so you have to pay for the higher tier of the product to feel satisfied and they in turn make maximum profits by doing this.
Some parents was criticizing this teacher in Texas for throwing his students a pizza party. He gives all of his students a slice of pizza and a drink for free. However if they want more, he charges them $2 a slice and $1 a drink. At the end of the day, everyone in his class was able to enjoy a free piece of pizza and a drink. He bought extra to sell to make his money back and that’s where some parents had an issue. Do you feel he was trying to scam his students or was he just doing the best he can because many teachers don’t make allot?