Risks

Yield goes down. Fewer free transactions. Your principal is unaffected.
kHYPE / HYPE depeg. Your principal is held as kHYPE and carries the same risk as any kHYPE holder.
Unstake delay. Kinetiq’s unstake queue applies on mainnet; Ichor will offer an instant exit via the kHYPE/HYPE market at the market’s price.
Smart-contract risk. Contracts will be audited before mainnet. Testnet contracts are unaudited.
Relayer availability (testnet only). If the testnet relayer is down, gasless transactions pause; funds in the vault are unaffected and withdrawable.