40% of block rewards is a huge incentive for dApp developers to build in the Astar ecosystem. In other blockchains like Ethereum, dApp developers need to apply for grant programs, issuance of tokens, fundraising etc. to earn some money. In the Astar ecosystem, as long as your dApp has been nominated, you will receive some basic income. As your dApp grows in popularity, more members of the community will nominate you and this means that you will receive a greater percentage of the block reward!