Developer’s fees in the cryptocurrency world, is a percentage of the mining rewards that is automatically allocated to specified coin addresses.
Usually, the developers of a coin are mentioning this percentage and the time frame that this process of accumulation is going to take effect. The potential investors should always pay attention for the possible developer fees because some cryptocurrency projects have set a really high percentage of the block rewards.
At the same time, this percentage is decided by the developers and these coins are not always used for the support of the project, so the transparency for this model is not always guaranteed. The miners of a digital coin could easily find themselves losing a great part of the potential mining rewards, many times without any good reason at all, as the developers of the project spend the collected fees for themselves and not for the project.