According to ChainCatcher, the Solana Foundation announced that it will introduce convertible grants and investments to support the Solana ecosystem. The mechanism of convertible grants is that they will only be converted into investment grants when the project reaches certain milestones, such as raising a pricing round or completing certain growth goals. For example, some excellent candidates for convertible grants may be projects that need support to build brand new proofs of concept before being able to raise venture capital, or operating closed-source infrastructure companies.

Investments are simply investments made by the Foundation into companies, and this option is more suitable for for-profit companies based on Solana that have commercialized products and are actively raising funds. The Foundation believes that these projects can directly or indirectly advance its goals to promote the adoption, utility, decentralization, or security of the Solana network, but may not be public goods. (Source link)