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"The time and energy spent to leave a good review probably helps the business more in the long term than any loose change could."

The conference maintained its homespun feel, with yellow T-shirt wearing activists wandering around with yellow buckets hawking for loose change donations.

The court heard that PC Carter's body-worn camera was found to have recorded him counting around £115 worth of cash in Mr Gaetani's wallet while he was sitting in a police car, along with some euros and loose change.

Soon tip jars that once collected loose change at cash registers morphed into touch screens suggesting significantly larger tip amounts, even for small purchases.

Though, at that stage, he was hardly digging down the back of the sofa for loose change given he was worth nearly $20bn, according to Forbes magazine’s rich list of 2018.