Simplify the following text for a Grade 7 native English-speaking person.
Original: The first two WrestleManias were financial successes , and after WrestleMania III became a popular event in wrestling history , the WWF then decided to expand their pay-per-view offerings .
Simplified: The first two WrestleManias earned much money . After WrestleMania III became one of the best event in wrestling history , the WWF then decided to have more pay-per-views .