The phrase "as an additional contribution" is correct and usable in written English.
It can be used when you want to indicate that something is being added to an existing contribution or effort.
Example: "The research team submitted their findings, and as an additional contribution, they provided a detailed analysis of the data."
Alternatives: "as a supplementary input" or "as an extra addition".
Maybe you can think of the $8 as an additional contribution to an organization you support.
This study also serves as an additional contribution in UFLP and may lead to another research in the future.
As an additional contribution, use of cold-adapted fungi for molasses decolourization was investigated for the first time in the present study.
As an additional contribution, these results refute the common belief that correct camera calibration and pose recovery are crucial to the accuracy of 3D visual servoing techniques.
As an additional contribution, we apply the runtime model to a real Cloud system, which is a practical evaluation on architecture-based integrated management of diverse Cloud resources.
The KVA payments by the management of the bank come on top of the trading gains as an additional contribution to shareholder dividends, which corresponds to risk compensation.
Meanwhile, formation of numerous micro-capacitors with AFs as electrodes and MoS2/PVDF composite as dielectric medium makes an additional contribution to the high dielectric constant of the ternary composite.
As a result of that it "made an additional contribution of £2.3m to the ITN defined benefit pension scheme in excess of the funding agreement with the trustees".
Kinshasa, 5 December 2008 - The government of Japan this week announced an additional contribution of US$7 million dollars as a grant to the Democratic Republic of Congo.
At lower temperatures, there is an additional contribution to the conductivity, which is visible in Figure 5b as a change in the slope.
An additional contribution of this paper is the presentation of an extensive survey of similar attacks in UMTS and related protocol infrastructures such as IP Multimedia Subsystem IMSS).
