It’s an interesting one - i can see why they are trying it, one of the biggest complaints from Merlins own food outlets is speed of service, there’s no doubt a contactless tap is quicker than cash 9 times out of 10.
As for it cutting off the parks target audience I’m not so sure - to be honest I can’t really remember how old I wasn’t when I got my first debit card but i certainly wasn’t that old, long with I’m sure the park has data on card usage to be able to work out just how successful it will be - be interesting to see in a month or so’s time if it’s it’s still a policy is as many of the parks outlets.