I mined sikka at close to 6 kh/s for a month. Not only did it have 40 million premine, there are way over 100 million out there now. Not even listed.
At that hashrate (right when the coin launched, I managed to collect around 1 million....
You forgot Iridium, Bitsum and several others besides Sikka that never made it to exchanges.
Azzi, in talks with exchanges just evaluating the best option for long term.