Imo SSP should have been closed or rewamped a long time ago. Since none of them are done now this is what we are recieving. And dont talk about arena cause that is another source(PVP) to gain soulstones. In PVE, with its current monopolization, there is legit no source to aquire noticable amount of soulstones since Tower of Infinity boxes got rewamped and now only giving Moonstone Crystal as material.