In the spirit of full disclosure, I've never watched an entire sermon by Joyce Meyer. I know very little about her doctrinal views, and I have no dog in the fight regarding the rise or fall of her ministry.
Part of the reason why people are given to believe rumor, etc., instead of getting the facts (which, btw, are readily available on wikipedia, for example) is because people love scandal. Americans in particular love to build people up into demi-gods then celebrate as we tear them down.
Joyce Meyer is a bit of a conundrum for many people because 1) she's a woman enjoying this level of success in a ministry 2) she's not affiliated with a church (and I don't mean that she's not a member or supporter of a church/churches, only that her ministry is not an outreach of a particular church or denomination) and 3) she's rich.
However, Joyce Meyer Ministries is a member of the Evangelical Council for Financial Accountability. In other words, her ministry submits their financials every year to this oversight committee for revue (they have done, apparently since 2009). These financials are available to review online.
Her income, btw, comes primarily from her book sales...which are substantial. I have yet to see a someone in here create a board about Christian writers and how they spend their money.
Some people go after Joyce Meyers (and others) based on doctrinal issues. While I can't comment on particulars, I've seen plenty of people float unsubstantiated propaganda about others and build some theological discourse based on false information. I think it's possible that some people have a false understanding of her doctrine and build their case based on erroneous assumptions.
Having said that, I'm sure there are also legitimate points for complaint. The idea that somehow someone must have perfectly spotless doctrine before they dare step forward and serve Christ is part of the reason why so many Christians are pew-sitters instead of more active in living the gospel. I give kudos to people who are out there willing to take a risk...even if they're risking screwing up. Look at Peter, when he implied to Jesus that he'd not really have to die, Jesus said, "Get behind me Satan!" to him. Yet Peter kept following Jesus...only to betray him. But he accepted the forgiveness of Jesus and kept at it...only to be corrected about food in a dream. And he kept going....again to be corrected about circumcision.
It's easy for people who are watching from the sidelines of the arena to take pot shots at the people who are actually gladiating. Those people feel very safe with their ideas. They can Monday-morning quarterback all day long. Of course, they can't be bothered to enter the arena. They prefer the safety of the cheap seats.