According to the items that can be consumed, dota2 should be the most. After all, interface, music, announcer and a hero can be divided into several parts.
According to the psychology of spending money, dota2 should be the smoothest. After all, the global unified jewelry market and excellent quality of works also make you willing to pay for it.
Generally speaking, dota2 should be the most expensive, and only dota2 can have a good time without spending money.