Iggy Azalea's career runs on money not common sense which is why there's so much confusion about everything she does.
Common sense says that Iggy wouldn't her time doing an arena tour with somebody else and splitting the profit with them if she thought she could do it by herself and keep ALL the money.

Common sense says that Iggy shouldn't have gotten the budget she got from whoever is funding her because EVERY thing she released independently flopped. She herself admitted that her manager had to convince people in the industry to take her seriously because nobody was returning her calls.

Why do you think that is? Because those people know that Iggy isn't shit when it comes to having raw talent or natural star power. Her manager obviously saw her potential and pumped a whole lotta money into her which is how she has so many smash hit singles but couldn't sell albums if tickets to her joint arena tours depended on it.