Electronic order matching does not always eliminate the need to have MM presence.
EMMs (Electronic Market makers) are often used to provide liquidity mainly for new contracts until volume grows. I believe the CBOT mini sized Dow contract used or still uses EMMs.
There are CME members that are always on the bid/offer if that's what you mean by market maker. They do not have any obligation to provide liquidity or fill orders like a NYSE or NASDAQ mm would have.
