Here is some of what often happens to me...
I see a base that looks like it needs some help, maybe a good front-line fight going on there with lots of action? Could be fun!
I jump in an La7 because it shows in the menu. I get ready to up, and see the ENY message. So, I click on the LA5 because it is in the menu and start to up again. No ord available at this base message, so now I have to I unload the bombs then try to re-up again. Get smoked from lots of incoming... so..
Decide to help from alternate base with bombers. They are available in menu so I click my favorite and start to up. Message, no ord abailble.
I say screw it, they dont want me to play. I shut off the game. Look to see what is available in free 8 player.
Get bored in free 8 player after a few days. See tank town map is up today. Click to enter game, then see tank town map too full. Exit game, back in, over and over... and over and over. Finally game says it is ok.
I'm sure other examples.
A lot of work to play the game these days.