Why pay for the rest of the characters?

I give this app 1 star cuz you only do 1 character and the others you have to pay I mean like I like her drawings but why pay for the rest of the characters and only draw 1 character, thats just a rip off

Pet lover 800 about Learn to Draw - How to Draw Cute Food - Ice Cream Desserts Treats - Art Lessons - Fun2draw™ Food Lv2