We'll continue asking CMC. It's only a matter of time before we're added.
I think there are some minimum requirements, like being on at least two exchanges and having a daily volume of 100k worth of trading. It may have changed recently but that is what it was a few months back. We'll get closer over time

2 exchanges are still needed, but 100k cap got removed. But they still require decent volume on both exchanges.
Ah ok. Yea I wonder why they removed the 100k requirement. Perhaps to discourage wash trading.
Plus some coins on cmc don't have 100k trading volume anymore. They may have at one point but now get very little volume, so that could be why it isn't a good measure of how active a project is.