I can't say I know the Orlando hotel landscape all that well, but the hotels I've stayed in that charge for parking do so because they were in a downtown location where land and therefore parking was a premium already.
Maybe the city creeping of Orlando has come out toward Disney, but they specifically bought all that land because they didn't want to be locked in like they are in California. They have land to burn (yes, I know they have some restrictions with respect to how much they can develop).
Heck, I could even swallow something like 5-7 dollars per night, but $13 per night for values that are already pretty far from the parks and the size of motel sixes?
I mean, is All-Star Sports comparable to these hotels amenity-wise? Are they struggling for parking spaces? Are they locked in land-wise? I'm running out of actual reasons. If I bring a food receipt or a gift shop receipt while staying there, can I get my money back like a day guest can?
Industry standard is a pretty bad excuse, and judging by the reaction, I'd say quite a few agree. Out of all the price hikes, I don't get the need to defend this particular decision.