Help. I have this situation: I'm going to set toll rates online membership "Lifetime advanced", the period of time for life- Never expires. Let's say it will be worth $ 1. After 6 months, or a year, if I change the price to the same level of membership "Lifetime advanced", such as $ 2, how will this affect those users who have already bought this level of membership "Lifetime advanced", a year ago, or a month ago, when the price was $ 1?
That is, is it possible to do so, raise the price of one and the same level of paid membership Never expires as the project progresses?
