Cheers. They were fun to take. To get that much depth, I had to get quite far away and use a wall for stability. Then I had to shoo the tourists out of the way and wait. If you think that I took it at Notre Dame, you can imagine the logistics needed.
No-one knows if they actually have the gold. They could just up and away with everyone's money.
Read up on them and you'll see they've had a few problems before, mostly to do with the way the brokers are franchises or something silly.
...and the number will be sold to a European/Asian consortium, used to purchase something in the US that gets sent to one of those "Earn money at home redelivering packages!" suckers, and redirected to Russia.
Will? No idea. There is a possibility, yes. Every time you leave the US with a fancy watch, you could be facing problems returning with it, replica or genuine, unless you filed a form declaring the serial number before leaving.
As for wearing a replica through European customs, yes, there is a risk.