Monero is a decentralized, open-source project led by the Monero Core Team. It is self-organized into several unofficial, volunteer workgroups. There are no requirements to make one, and few have requirements to join.
Most Monero contributors work pro-bono. However, for those who do need funding for their work, people can use the Forum Funding System (FFS). In a GoFundMe-like fashion, people can pitch ideas, ask for donations, and receive payment when set milestones are reached. At the time of writing, over 38,977 XMR has been crowdfunded since the start of this initiative, totalling $17.7 million in current prices.