This is well-intentioned and incredibly damaging. There is no amount you can pay to uneat an animal.
How much would you need to donate to make it OK to throw your trash on the ground? For most people, the answer is "there is no amount". But by putting a price on it, you've normalized it.[1]
A "charity" like this makes any actions seem fungible and tradeable, some of the worst effective altruist/tech bro mindset. You shouldn't "hack" morality with capitalism.
1: https://econlife.com/2018/09/unintended-consequences-from-fi...
Related:
The climate mitigation gap: education and government recommendations miss the most effective individual actions - https://iopscience.iop.org/article/10.1088/1748-9326/aa7541 | https://doi.org/10.1088/1748-9326/aa7541
Demographic and Socioeconomic Correlates of Disproportionate Beef Consumption among US Adults in an Age of Global Warming - https://www.mdpi.com/2072-6643/15/17/3795 | https://doi.org/10.3390/nu15173795
Global greenhouse gas emissions from animal-based foods are twice those of plant-based foods - https://www.nature.com/articles/s43016-021-00358-x | https://doi.org/10.1038/s43016-021-00358-x