Incubators are in fact cheap outsourced innovation departments of large companies. Once you get there (which is not difficult), they will steer your solution to fit the large corporation behind. Largest companies pay lip service saying they support "innovation" by providing start-up competitions. In fact, they buy almost none from start-ups. They are in fact searching for cheap or free technology ideas and services. Absolutely no significant success has come from corporate incubators in Brazil. You are there as a small piece on the board.
My advice to start-ups in Brazil? Build as much as you can by bootstrapping and try to sell as early as possible and avoid any "free" pilots by corporations trying to use your solution. Charge and charge upfront. I sadly see too many start-ups providing free services to large companies in exchange of vague promises. You are just a piece used by employees in these large companies to promote innovation and cheap solutions.
if large comporations want to support startups they should sign a CONTRACT and BUY from you. That's it! Anything else is just exploitation of technical talent and naiveté from your start-up founds.