Why Did So Many People Sign Up For Medicaid Through The Exchanges?

The more I learn about Medicaid the more I am puzzled why so many people signed up for Medicaid through the exchanges. With all of the churning Medicaid causes I doubt the people who are already familiar with Medicaid are thrilled that they are signed up again. Despite the web site problems they came in droves. I suspect they were hoping for free health insurance and got Medicaid instead. That has to be disappointing. It is the old bait and switch routine. So the sales technique we find reprehensible for used car dealers is okay for government health exchanges? So now we are left with the question, how many of these Medicaid signees are actually benefiting from Medicaid expansion or are most of the Medicaid signees benefiting from better health care in name only?