Hi Minna-san,
As obvious as it is, I'm currently new into this community and to this game (currently patching and the patching process is slow, not the speed, but the process) -_-. So I as always I try to go into the Payment page and see how much my money will convert to Game Cash (which is RP in this game). Then went on to item mall to do some canvassing of the prices. So I think the prices are a wee bit high + a combo of the "days" tag in some of the items (I'm not referring to all of the items, but some are just worth higher to me, that is).
P.S.
The forums runs on Google Ads as well -_- This is just my own opinion but is this game greedy for player money?