The Raid Bounty descriptions says, “Increase the raid income for igniting a building to +50 food and gold.”
In fact, it increases it from 50 food and gold to 75 food and gold.
The Improved Raid Bounty description is also wrong. It says: “Increase the raid income for igniting a building to +75 food and gold.”
In fact, this research will increase the bounty to 100 food and gold.
I haven’t tested Stone bounty but I suspect it may be wrong as well.