All three participation levels are for medical cost exceeding your personal responsibility amount (It's like your insurance deductible):
$0 Gold plan
$1,000 Silver plan, per medical event
$5,000 Bronze plan, per medical event
With each program, you receive credit toward your personal responsibility when you obtain a (self-pay) discount from the healthcare provider, of any amount on your eligible medical bills.
Each program has a per-illness limit of $125,000, this limit can be exceeded if you have Brother’s Keeper program (The Gold plan combined with the Brother’s Keeper program has a no limit amount per eligible illness!