It will be hard to survive as a team without any sponsors. Unless you are consistently winning tournaments, it will be very hard to even just to sustain the payment of the players. The average salary of professional DOTA players is from 10 to 15K per month. Really top players can get up to 35K per month. Without sponsors, teams will not be able to keep their players. So if a team is not performing well, team owners choose to sell their rights to other team owners.
It's different for those that have already won majors and got enough savings. But it's true, a team that doesn't have any major sponsorship will struggle in the long run.The salary of the professional Dota 2 players are quite high and that's for real. An organization is earning not just from tournament winnings but mostly from brand deals and sponsorships.
AFAIK, with tournament winnings, the players have % on it and they'll have to share it with everyone together with the org.
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Spawn advanced further in the upper bracket and is now one series win away from qualifying while Neon got knocked down to the lower bracket. 