"Esports" is not a league. That would be like saying "sports" is a league.
There are leagues around some games (like the ones mentioned in the article). There are also events with "league" in the name that are not really leagues (like ESL Pro League). In any case, none of them are financially successful in the US.
There are leagues around some games (like the ones mentioned in the article). There are also events with "league" in the name that are not really leagues (like ESL Pro League). In any case, none of them are financially successful in the US.