For as much as I like to say how much GnR has a huge fan base in Brazil - and it does, we can sell out stadiums - I prefer if they played smaller venues with more dates - like the Canadian dates. It's a really intelligent choice!
In Brazil, our stadiums were built for soccer and only two/three of them have structure to host a concert as big as GnR, so asking Guns to do stadiums here would mean asking them to do only S?o Paulo and Rio de Janeiro. All other stadiums are terrible for concerts. For example, Axl wouldn't want to play Belo Horizonte's "Mineir?o" Stadium knowing the fame it has to have awfully bad audio spread. This is something the concert promoters in Brazil are aware of and now they prefer to get the international bands to play mini-tours, doing arenas with 10 to 20,000 people capacity, playing a lot more dates throughout the country.
1 - It is more profitable than the traditional two stadium concerts for them;
2 - A lot more people get to go to the concert (not everyone can afford to go to S?o Paulo or Rio just to see a band);
3 - A smaller venue means fans get closer to the band, have a better stage view, have more comfort and a better overall experience.
The advantages are many to both sides so why not? Why be bragging about us being capable of selling out stadiums, if stadium concerts are a worse experience, not accessible to everyone in the country, and our promoters are all for doing the mini-tours instead?
I'd say leave the stadiums for the festivals, and bring Guns to do a mini-tour in Brazil like they're doing in Canada