[Symbiote]

Presumably a business can request them from a bank?

I would expect 50¢ and $1 coins to be especially popular with people running vending machines or other machines giving change. 50¢ coins means refilling it less frequently, and encouraging $1 coins means less trouble recognizing paper money.

I wondered how the coin mechanisms on pool tables work in the USA, since nowadays it's probably not unusual for the price to be more than $1 or $1.50 (depending whether the mechanism has 4 or 6 slots). In Europe they just take whatever mixture of coins is appropriate, an image search suggests in the USA one must buy metal tokens to feed the machine.

I remember trying to feed about $6 in quarters into a payphone in the USA, when there was some issue with travel insurance and we had to make a call to Britain. We couldn't put them in fast enough. Eventually, the cheap motel let us use their normal phone.

(The first two are still in widespread use in the UK, although I haven't seen them much in Denmark or Sweden. Here, they're more likely to have replaced the coin slot with a contactless card reader.)