Now that I am at Curry I can answer my own question. It is free but the number of logins is limited. We've waited up to an hour to get on. I ran the DSL Report speed test and got 156 down and 326 up. I tried another time and the page wouldn't even load. The Lodge used to charge $7.95 for 7 days. Now they are asking $5.95 a day.
For the purists, I don't spend all of time up here on line. Wednesday I hiked Half Dome on a cold windy day, up/down the JMT in 8:18. Yesterday up the 4-mile trail to Glacier Point, Sentinel Dome, Taft Point and back down in 7:25 (18.6 miles from shuttle stop 7 and back). Went by the radio building and located the Sentinel Dome webcam (under the eave on the north side of the building for those who are interested). They use a microwave link to the west to connect to the outside. I did that kind of stuff in the Army Signal Corp in Nam 40 years ago.