Tangaria is a free and open-source game. The project exists purely thanks to enthusiasm. Server hosting costs around $300 per year, which I pay out of my own (leaky) pocket – and you can help too, if you’d like to support the game.
PayPal:
igroglaz@gmail.com
Also you can support via Boosty (it’s like Patreon):
https://boosty.to/tangaria