They have $25 and $50 - I want to say $3.95 for $25 Visa and $4.95 for $50 but I can't remember now.
If the fee is $4.95 for the $50 Visa:
$54.95 = 219 points = .20 off/gallon
buy a $50 Disney gc with the Visa = 200 points = .20 off/gallon
Total: .40 off/gallon.
17 gallon tank x .40 off = $6.80 - $4.95 fee = $1.85 or, 3.7% off per $50. Meh.
35 gallon max x .40 off = $14 - $4.95 fee = $9.05 or, 18% off per $50 - definitely great!
If you just bought a $50 Disney gc, not the Visa:
$50 Disney = 200 points = .20 off/gallon
17 gallon tank x .20 off = $3.40 =6.8% off $50
35 gallon max x .20 off = $7 = 14%
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If the fee is $3.95 for the $25 Visa,
$28.95 = 115 points = .10 off/gallon
buy a $25 Disney gc = 100 pts = .10 off/gallon
Total: .20 off/gallon.
17 gallon tank x .20 off = $3.40 - $3.95 fee = NEGATIVE .55 = Don't Buy $25 Visas!
35 gallon max x .20 off = $7 - $3.95 fee = $3.05 or 12% off per $25. Pretty good!
If you just bought the $25 Disney gc, not the Visa:
$25 Disney Visa = 100 points = .10 off
17 gallon tank = $1.70 off = 6.8% off per $25
35 gallon max = $3.50 off = 14% off per $25
Compared to the $100 Visa gc with $5.95 fee:
17 gallon fill up = 7.65% per $100
35 gallon fill up = 21.25% per $100
The moral of this story: try to use max 35 gallons or close to it to make this work!
Hope I got my math right!