Stake CAKE, earn other tokens: What is the incentive for project teams to mint their tokens in this way?

As per the docs here: https://docs.pancakeswap.finance/products/syrup-pool/syrup-pool-faq,

project teams will mint their tokens as rewards to people who stake cake on pcs. What is the reason for project teams doing this way? Do they use the staked cake as some capital? Do they use our staked cake in other sources to earn interest? Or some other reason?

Stake CAKE, earn other tokens: What is the incentive for project teams to mint their tokens in this way?