I'm not in their telegram's channel, can you ask if they 're planning to develop an internal exchange as well? I think that could be important
What do you mean internal exchange . Like trading assets and items ? Or fiat conversion
Sphere will have a marketspace where you can trade stuff, but as for exchange, like cryptoexchage, I don't think it makes sense.
I also think the market place will be more about selling your data and maybe you can buy and sell physical stuff.