Who can predict the future...
But, if a poker room has 6 max and FR tables in their software, and customers are sitting at the FR tables and playing, here is no reason for a site to stop this. For every full table, an empty one pops up.
The software has FR, 6 max, heads up etc. I cant see a poker room changing this. I see other games on some sites with no traffic at times, the poker rooms leave these games up. Why not? If the tables stay empty 23 out of 24 hours, they still get that 1 hour of rake at no extra cost, and FR is active a bit more than 1 hour a day.
I play 6 max...lol