The short answer is yes - in-app purchases can earn affiliate commissions. However, there are a few technical details.
With the new platform (PHG, which took LinkShare and DGM on October 1), only in application purchases from the application that was indicated in your affiliate link will be eligible for commissions.
Earlier, and still with Tradedoubler, in-app purchases from any app are eligible for a commission.
It is also important to indicate that the branch window (how long the membership lasts) is 72 hours for LinkShare, DGM and Tradedoubler, while 24 hours for PHG.
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