That’s not true, Zeny sellers change their prices based on the economy. If anything, 10$ is going to get a Zeny buyer a lot more now.
come to think of it the more expensive Silvervine is the more expensive RMT as well too.. that makes a person to think twice which to do illegal or the legal way.
and the only reason why you buy WPE aside from VIP is because of the Silvervines. You think RMT for example would sell 20M for 1$? I don't think that's profitable and the farming of zennies for botters will be difficult. check Ragial and lookup the price of SV on other Servers to compare.