I just saw they silently added new perks (only for backers with a boxed Turris Omia):
- Hacker pack ($39): high quality USB-UART cable + custom top cover with holes for connecting accessories.
- LTE expansion pack ($119): compatible LTE modem with 2x2 MIMO for superior signal incl. 2 extra antennas & pigtails.
Damn it guys, you can’t do this to my credit card! 
Edit: Ok, actually they beat me by a few minutes with their campaign update. 