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The timer logic introduced to the postback mechanism in SKAdNetwork 2.0 is convoluted and confusing. I'll attempt to explain it below, but this article should be seen as necessary background in understanding the SKAdNetwork postback. Conversion Value Conversion Value is a parameter that was added to the SKAdNetwork 2.0 postback that is sent from Apple to the ad network that sourced the user to the app. The conversion value is a 6-bit value; a 6-bit value is a sequence of six characters, each of which can only contain either a 0 or 1. A 6-bit value can take 64 different values (2^6 = 64). The highest possible value for a 6-bit value is 111111. The lowest possible value for a 6-bit value is 000000. To understand how 6-bit values "ascend," or increment, see this article. Postback Timer If the developer wants to include a conversion value in its SKAdNetwork postback to the ad network that supplied the user, they should invoke the The 24-hour timer is reset each time the updateConversionValue() method is fired with a 6-bit value that is higher than the 6-bit value currently recorded (or if a 6-bit value is being provided for the first time after app open). From the documentation: If updateConversionValue() is called with the same 6-bit conversion value as is currently recorded, or with a lower valued 6-bit conversion value than is currently recorded, then the 24-hour timer does not reset. And calls to updateConversionValue() after the postback has been sent do nothing. Once the 24-hour timer expires, a second, random timer of less than 24 hours starts. This timer is not resettable and is only meant to obfuscate the process such that the app developer won't be able to map a received conversion value at a network with a user who took the action mapped to that conversion value at a specific time. A few things to note here:
The conversion value is an arbitrary mapping that the developer can attach to anything in the app: to a specific event being trigger by the user (eg. complete level 7, finish tutorial, make payment, etc.), or to some imputed LTV of the user at that time, etc. Managing conversion values will be a central component of advertising strategy in iOS14. Marked as spam
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