Yes unfortunately coinmarketcap needs to be updated by coin developers to let them know of any new exchanges coins are listed on from what I gather but all these coins have been listed for a long time on freiexchange  and still coins have not updated coinmarketcap so the devcoin etc developers must contact them for this to happen.

Freiexchange is ran by freicoin community and supported by fed fab (one of the blockstream founders along with Mr Timon)and VERY credible people so people should support this exchange which is hosting ancient coins for their legacy criteria although I do not see namecoin there yet for some reason.