Because people pay for it and we got no other way of money to advertise and grow bigger? Bonds is not bringing in enough money.
@zeik 99% of servers are pay2win, no one forces you to buy it, those who buy it are loaded, for example, there is someone who used to play like 5 months ago that has purchased over 2500 bonds. that's just 1 person.
Also the zone would not be at the op point until you spend like $200-400+