Well, block-based gaming sounds frustrating to say the least... and the whole idea of getting paid to play is never as good as they tell...
But hey!!! I'm not criticizing this idea, I would love to see it happen and that they actually pay me for my skills and awesome luck, but... can't see it happening, not even on a medium scale. Your choices are valid, EOS is definitely the game currency and your explanations to justify how it would work are solid, but never underestimate bots when there is money on the line... I would hate to see 100 fake accounts to act as bots farming something, there is also the cross-compatibility issues between games, a sword worth 1000$ like you said might be awesome in one game, but not in another... there ARE points that need to be addressed before reaching good games here, but you made some good solid advances :D