ask for it

“I didn't ask for it. I can't hide it, and I can't return it. So I clicked on monetise,” she tells me, estimating she can make a couple of hundred dollars a month.

Jemma Swallow, who used to own a tea shop in London, says 10% "covers most situations, without leaving the customer resentful of being asked for it and the staff for not receiving one".

Actually, the White House approved a federal disaster declaration immediately after the governor of Tennessee asked for it.

"People were coming asking for it straight away, as soon as September started," she said.

Already this year, 18 people have handed over almost £620,000 without the taxman even asking for it, according to figures obtained by the BBC in a freedom of information request.