Honestly you just need to advertise more, Twitter is great but your main supporters are guys like us on this board, I can almost guarantee half of your members are posters on here.
Your main people that would love to donate to the cause could be reached by better advertisement. Start advertising any and everywhere. On game tickets, on billboards, on stadium walls, anywhere and everywhere.
You have to get those individuals that have the money to do it, and Twitter is full of a lot of kiddos.
Do a Spyre tailgate for the football games, etc. that will get people interested.