We participated with good results (IMHO) in the first round, see https://gap.karmahq.xyz/project/improve-the-security-of-the-avalanche-network-by-auditing-porting-and-testing-its-fundamental-tools-on-openbsdadj/grants?tab=milestones-and-updates and https://www.pasosdejesus.org/avalanche-adJ/. As a result (1) we contributed more than 10 PR to several ava-labs repositories, (2) we were able to port the fundamental tools (`avalanchego`, `coreth`, `subnet-evm` and `avalanche-network-runner`) to OpenBSD/adJ and (3) we are running a validator node for testnet for a month running it on OpenBSD/adJ (see https://subnets-test.avax.network/validators/NodeID-6d4VNVPxnk8g4NHfFR2ombAz1W23454pw )