You already played out all your tickets for the single player, skirmish or the event.
Or you wait for the crate to arrive? Remember the amount of time till the crate arrives.
Exit the game.
Click your windows time in the lower right corner of your screen.
Click Date and Time Settings.
Disable "Set time automatically"
Click on "Change" beneath "Set the date and time manually".

After all this time hacking ALWAYS put your time back to "Set time automatically"!
You don't want to run your pc with a wrong time.

You can now change your time in to advance for the amount of time your crates needs to arrive.
If you open the game first time today you mostly will have a create, open it.
Next crate arrives in 4h. After opening the create it will be a bit less than 4h.
Now exit the game and change your time exact 4h into the future.
Start the game and see, after the "Your clock is messed up" screen that the crate should be ready.
Repeat as long you want, Exit, change (everytime exact 4h in advance) save time, start game, get crate, exit, repeat.

Attention: If you change the time for a greater amount it can be your crate delivery will jump out of the 4h bound and you wont catch it again. Set your time back to "Set time automatically" and start the game. It could be messed up for some hours.
If you have to wait like 12h for a crate, forwarding the clock will most likely not work at the time.
Come back in one or two days and everything should be fine again.

If you run out of tickets for any of the three game modes just forward the time the needed hours to get filled up again.
You can jump more time here than for the crates.

The main game mode needs per ticket, i believe, about 40min.
You can jump 6, 12, or 24h forward to get a lot of tickets so you can play as long as you want.

Skirmish need 1h for a ticket so jump 5h in the future to have 5 tickets.
Play , exit and set the clock 5h forwards to play 5 more skirmish games. Repeat.
Oh, and if you get your time back, wait a day, your skirmish will be closed.
If you wan to win your skirmish you have to play it all through.

This is a serious hack for this game.
I don't recommend you doing this.
I don't take any liability for this guide, for your save games
or for the money loss the devs gets.
If they program it this easy then they accept to lose money that way.

Have fun.
Write something stupid in the comments because this is a very boring guide.