The only wedding I've been too where cash figured in the gifts was in Greece, but I don't know whether that's a Greek cultural thing or whether it was just about the logistical considerations, that guests coming from the UK probably wouldn't be able to bring bulky gifts or deal with a foreign-language registry. In fact, like all the weddings I've been to overseas, the couple made it clear that putting in the time and money to do the serious travelling involved, was a gift in itself and guests shouldn't feel obliged to give an additional gift. (Almost all the guests did, though.)

I'm with tman, I'd expect a wedding to "operate" at a very substantial "loss", probably more substantial the more upscale the wedding. I'd be rather taken aback if I heard someone, however informally, weighing the income against the expenditure. (The tradition in the UK used to be that the couple's parents pay for the wedding, so in that sense the couple were guaranteed to turn a profit, but nowadays it's more common for the couple to pay for it themselves.)

I thought this was going to be a thread about dollar parity...

Peter