Agoras will be an economy offering many new features, like trustlessly hiring programmers (as in the blogpost Code and Money), or hiring other professionals (c.f. Bitagoras), or computer resources (like Zennet), or release coins for any provable "thing", at the sense of tau's proofs.
All Agoras' markets will have one coin. Those coins are being pre-sold, and the msc intermediate token is only for buyers to have something transferrable in hand and will be converted to the real coins. So the msc tokens will cease being operational upon Agoras' genesis where the actual coins take place, and the buyers get a share on Agoras economy.