Why, what does living in poverty have to do with anything? I don't think Osteen should be taking people's offerings for his vacations, but he makes millions selling books which is his money. One major difference between the two is how many souls do they reach. Osteen reaches millions. In the body of Christ, it takes all kinds.
Our Lord traveled as an itinerant for only 3 years, didn't ask for donations, didn't drive a fancy car or have access to mass media, yet changed the thinking and beliefs of a good portion of the world.
Regardless of Osteen's motives though, the Lord is using him for His own purposes to reach specific people. Personally I choose not to listen to televangelists solely because I think fame and fortune have a way of turning the focus away from God, but I would never support a movement to silence these preachers.
Again, regardless of satan's involvement, the Lord can turn any situation to good use. Some, like myself, trust the person who has been through the fire, others view things differently, so you are correct. It does take all kinds.