I am 100% sure progaming and the related gaming industry moves more money around the world than bodybuilding and the related fitness industry.
By itself, progaming in SKorea is comparable to futbol in any given country in Europe, millionaire contracts by teams, publicity contracts, advertisement contracts, its HUGE. A teams, B teams, hordes of fanatics everywhere, girl fan clubs, everything.
Boxer used to win like USD 800.000 each month back in 2002-2004, all of the major names, July, NaDa, YellOw, Iloveoov, etc won a little less, just by team contract, add to that everything outside their gaming contracts, specially price money for all the number of tounraments and games they played.
Anyhow, i could go on with this but you get the idea.
yes, it is a sport, more so than bodybuilding as it actually means competeing through physical/mental skills, unlike bodybuilding.
ps: that is only starcraft, you posted Starcraft II which is still nowhere as lucrative, Warcraft III also had a good period, Counter Strike, Quake and the rest of the games I didnt even mention.