We spend a lot of time developing and maintaining RetroPie. Contributions to the project are always appreciated, so if you would like to support us with a donation you can do so here. Donations are split between the developers after hosting costs.
You can donate via bitcoin by sending to bc1qdswfgaxr5hey5umvfhym954msdkdlg680gcyf5
You can alternatively back the main developer over at Patreon – https://www.patreon.com/retropie