rbt
Senior Member
Presumably Presto will ultimately give you a better deal than just using a credit card. I'd expect that they'd ultimately offer better pricing to those using Presto - presumably they'd have to pay less service charges to VISA/Mastercard/Interac per transaction.
I'm going to be seriously pissed if they aren't bundling their charges to their payment processor. That's an pretty damn standard feature at this point for low value transaction processors.
First charge should be a single cash fare but at that point they know the card/account is valid.
For your second trip they can authorize and hold for a non-trivial amount ($20) and come up with a final charge calculated at the end of a reasonable period (1 week to 1 month, or when the user hits $20 in services) and charge what the customer actually used and release the hold/begin a new hold. Email the customer an invoice showing individual line-items when it happens.
$20 could be as high as a monthly pass value instead if users want fewer line-items on their bill.
Combining of small value charges is actively encouraged by Visa/Mastercard. Presto has absolute control over when the actual charge occurs.
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