Disadvantages of internal currency in DApps

The only demerit of having internal currency in DApps is that the DApps are not free for use anymore. This is one of the places where centralized applications get the upper hand as centralized applications can be monetized using ads, providing premium APIs for third-party apps, and so and can be made free for users.

In DApps, we cannot integrate ads because there is no one to check the advertising standards; the clients may not display ads because there is no benefit for them in displaying ads.