Thats the Visa Entertainment presale, which is for people with Visa.
There's also the normal presale.
MY TICKETEK INTERNET PRE-SALE
Pre-sale starts : Thu 19 Mar, noon
Pre-sale ends* : Fri 20 Mar, noon
General public on sale : Thu 26 Mar, 9am
A pre-sale is an opportunity to secure tickets prior to the General Public, not a preferential seating service. A selection of seating throughout the venue is made available for pre-sales.
*Or until pre-sale allocation is sold out.
On sale times are quoted in local time.