Right now in discord, you can't get SEM unless you pay about 23k satoshi btc per SEM. Thats around $2.5 per SEM. Given that SEM in circulation is about 25 million (the other 75 million is block rewards), we can say that the market cap is around $60+ million.
You don't correctly determine the number of coins in circulation. Coins that are in the hands of the developer can not be attributed to coins in circulation. Therefore now it is much less coins on hands. I did not count for sure, but something about 3-5 million. Only these coins are now available for sale. More precisely, they can be accessed if someone wants to sell them.
Just for info: 3,629,289 SEM in votes.
Do you mean that developer doesn't join the voting process and validation?