I'm logged into exchange.alt.market right now. Just checked. Don't know if you still need a referral code to sign up, but I had no problem doing so when I registered a couple weeks ago when it opened.

I'm not aware of the existence of a "license to sell cryptocurrencies." AltMarket has been registered as a MSB since 2017 if that's what you mean. You can look it up on the FinCen database here: https://www.fincen.gov/fcn/financial_institutions/msb/msbstateselector.html

AltMarket is only dealing with commodities and there is no license needed to sell commodities like Tao any more than you'd need a license to sell baseball cards or t-shirts, etc. Not so with most ICO tokens on the other hand.

They have exclusive contracts with the artists they represent and as such have a monopoly on sale of the icon tokens.

Any exchange that tries to list ODBcoin or any of the six scheduled for 2019, or the ones that follow, without getting permission can be sued on behalf of the artists for unlicensed use of their image and name. Just like Kanye West sued the developers of Coinye.

The exchange is purposefully defeatured during the ODBcoin crowdsale. You can only register and buy ODBcoin currently. Trading comes later.

Remember the point is not to appeal to crypto traders but to the mainstream audience of music fans, so while the exchange features are there, they are disabled to present as simple an interface as possible for regular people. As I'm pretty sure I've explained.