Hi, sorry for late reply

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Steam would be cool. Though, remember that it's not an open platform. You don't just "put" your game on Steam - it takes several formal steps and lots of luck to get them interested. And if they accept it, then you're up for more formalities and work to actually get it on the service (can't talk about details, but the company I'm working for dealt with Steam before and believe me -- it wasn't easy).
Most of the time, they won't even respond to emails from indies, unless the game is really well known or hyped. They just get way too many submissions like that. So it's not like Steam would be a good promotion - it's that I would need much better promotion to get on Steam

. MAGI is just a too small and niche little game to get accepted.
I'll be trying with ArcMagi though

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