Why Don't They Help

I as getting onto Trax yesterday and I tried to pay for my ticket. Last time I used Trax I put in a $20 for two round trip tickets (cost $8) and got $12 in useless Susan B. Anthony dollars.

This time I was smart and brought dollar bills. The machine wouldn't take them. In fact both machines wouldn't take my dollar bills. The machine kept saying "Bills Not Accepted" as I tried to cram the dollar bill into the slot.

I guess I now know the use for the dollar coins. I had to track down a bus driver who took my dollar bills and gave me a ticket.

My question is if they want us to use Trax and they want us to pay for it, why don't they help?