You could get GA pit tickets through Backstage's "fan club seating" but they have the outdated stipulation to "be at the venue" to buy your tickets.

Maybe in Europe you could get into the FC area just by showing up the day of the show? A European could answer that.

If you live outside the areas where the band plays, it would be best to be independently wealthy enough to travel with a few days notice for the CHANCE to buy a single ticket (hoping they don't sell out) and travel again for the show. It would help to have no pesky responsibilities like a job or a family since you need to be away from them for both buying a ticket and actually attending the show. If you're in the fan club only for the tickets, you need to live in a major market (like north of the equator and, preferably, north of Mason-Dixon line). Keep that in mind should they re-open the club with the same archaic ticketing system.

Given the price of booking a flight with 3-5 days notice, you could simply stay at home, go to work, and buy the tickets through a Ticketmaster auction or even from a scalper with less hassle and expense.

On the subject of Backstage not accepting any more members, they stopped accepting new members last December. They've talked about ending the FC several times. There's nothing certain about what will be available as for as the fan club goes in the future. I'm sure there will be something, but they haven't announced what it will be yet.