Mods, my sincere apologies if this has already been asked elsewhere and I missed it.
Yesterday, in a post in the FAQ thread, it was stated:
Q - How Many Tickets Can I buy? A - As a paid-up U2.com Subscriber you are eligible to purchase up to TWO tickets for any ONE show in Europe in a single transaction OR up to TWO tickets (in total) against up to two shows in North America. (This is because ticketing vending arrangements are different on the two continents
In the Tours section, you are currently encouraged to “Make sure to read the updated FAQs.”
There, it says:
Q - How Many