number 1. crysta system..... they could have easily used POL's monthly charge ect or even added time cards.. but buying POINTS SCREAMS f2p with cash shop... think DDO and LOTRO... and RF online.. all pay to play games that went free to play with cash shop
number 2. they can get alot more monthly income doing this and heres a list why. imagine
0 anima regen at all.. instead you pay 500 crysta to regen anima.
weekly fatigue turns into monthly fautige and cost 700-1000 crysta for a reset
1 guardian aspect regen. another 500 crysta for full reset maybe less on this one like 300 crysta
a flat 500 or 1000 crysta charge for a permanent character slot
a monthly 100 crysta per retainer
the list goes on
the average non stingy/poor player would be spending abt $50 a month instead of $13 and that would make up for the people who play for free..
and in like all other cash shop games.. unless your using the cash shop you fall way behind everyone else. thus getting more people to buy crysta