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Before starting working on the SteemQA project I contacted the Musion.io team to see if they would be interested to get help with the development of their app.
They weren't interested. Musing-io was also not open source.

So I decided to start my own Q&A application project which hopefully will distinguish itself enough from musing so as to provide a clear choice for users.

Sounds awesome, I always will prefer open source over closed source

Same here. The fact that the project is OS is much more in the STEEM spirit.