someone explain ''MLB and Disney pick up 'League of Legends' streaming rights"

RiotMagus quotes "Will be straight with you guys - there will be ads. There will be integrated sponsorships as well (like Acer over Worlds and All-Stars). That's the price of having a sustainable sport, and one we think is worth it. We have the "commercial / music" break (even though there aren't always ads to run) between segments because we knew this would be the case even when we started the LCS back in 2013." according to engadget riot already gain over $1 billion in revenues per year (which is good) what i cant understand is they say there will be ads but where? in the client in the gameplay or in the tournaments ? thanks in advance.