Cryptocurrency marketcap trackers originally hard excluded substantially premined coins-- for just this reason--, but eventually the bribery won out.
Absolutely agree with that.
I made a request in the Coingecko thread (CMC seems useless as they're exchange-owned) some years ago to at least add a tag or a list for coins which aren't premined. Never any reaction.
Well, I ended compiling my
own list of non-premined coins, for sure incomplete but better than nothing. I excluded fork coins like BCH as their "market cap" also benefits a lot from non-circulating coins, just like premined coins do.