Indeed, licensing may have been a major factor in convincing Disney to make the movie. A hot property can be a cash cow, enriching the studio with sales of video games, toys, costumes, action figures, jewelry, etc.
The Lone Ranger
The Lone Ranger–7″ Scale Action Figure–Series 2
The Lone Ranger–1/4 Scale Figure–Tonto (Case 2)
The Lone Ranger–Head Knocker–“Tonto”
The Lone Ranger–Men’s “Tonto” Costume
The Lone Ranger–Women’s “Tonto” Costume
The Lone Ranger–Prop Replica “Tonto” Headdress
Needless to say, these items perpetuate the movie's false and stereotypical representation of Indians. And the items don't include any explanations of Tonto's character--nothing about how he's half-crazed and not a typical Indian. Buyers have no reason to believe this Tonto isn't a genuine Indian--especially if they recall the assurances from Disney, Depp, and the Comanche Nation.
For more on Johnny Depp and Tonto, see Tonto Costume at Comic-Con, Racist Car Ad Features Tonto Ripoff, and Disney Store Sells Tonto Costumes.