VetTix.org gives out free tickets to military members and veterans. They have tickets currently available for the ASU game and will be giving away tickets in a couple of weeks to the PAC-12 Championship. For the PAC-12 Championship they will use a lottery system and you use their virtual coins to request them. This link will get you 15 extra coins if you sign up with a referral from me:
http://www.vettix.org/ref/369264
I also get 15 extra coins. I have plenty. If you sign up board-mail me your referral link, I will replace my link with yours so others that sign up will get you the extra coins.
People can also donate tickets they can’t use for any event and it is a 501c3 so it can be used as a tax write off.