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[www.u2.com]

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.

Q - On Previous Tours, Subscribers have been able to buy up to four tickets ?
A - When the band play outdoors in stadiums, subscriber presale access has been up to four tickets. When the band tour indoors, in arenas, ticket capacity is reduced and subscribers qualify for up to two tickets. In 2015 the band are playing indoor arenas.