There was never any public or private fundraising, no Initial Coin Offering (ICO), no securities offering, no VC, and no crowdfunding of any type. The network was fairly bootstrapped similar to Bitcoin using pure proof-of-work from block height 0 and units of Radiant are emitted to the miners for energy expended according to the network's consensus policy. Anyone may participate and earn on the network by contributing computing power, similarly to Bitcoin itself.