It seems there is more than one definition of 'punter'. I meant it as 'customer/client'. But other sources define it as 'a person who gambles, places a bet, or makes a risky investment'.
Not really. There just seems to be more than one meaning, and we were each aware of different ones. The meaning might vary by country (I am in the UK).
I am from the UK but moved to Australia about 35 years ago
I wouldn't lose any sleep over it.
;o)