I’m told that time is money, but the exchange rate is not universal. There are people whose time is, apparently, worth more than my time. But we can agree that the exchange rate is there, and it’s one of those aspects used to sell convenience in almost every game going. You can spend a whole lot of time leveling a character to the level cap in World of Warcraft, or you can just pick up a level 90 boost and save yourself a pile of time. Experience boosts, travel speed boosts, crafting time boosts, they’re all functionally ways of trading money for time.
I’m not going to tell you which ones should or shouldn’t be there, because quite frankly? That’s not all that interesting. Everyone’s opinion about what should be traded for money is different, and that’s fine. No, my question is far simpler: which do you find you have more of to trade? Do you have plenty of time to play but not all that much spare money? Enough money for all of the boosts and not nearly enough time to play as it is? Too much of both or not enough of either? You get the idea.