Microtransactions are becoming evermore entwined with the buy-to-play revenue model as most recent games allow for some sort of additional purchase.
Some studies have been completed on the success of the free-to-play revenue model and also gamers' perception of this method.
The results of one study shows that players are often satisfied with purchases made in free-to-play games, however, they believe a lot of content is overpriced.
The study also displayed that free-to-play game developers create restrictions in order to encourage more purchases.
[3] Pay-to-play (P2P) is a model in which a subscription payment is required on an ongoing basis, in order to use a service.