no, definitely NOT sustainable. As liquidity is added or if token value decreases, the APR will reduce quickly. The whitepaper specifically announces when block ends so that stakers can pull out staked funds. But the site is so complex with 4 layers of defi, that I do not believe it is an intentional rugpull. Most rugpulls that I have lost money is when project devs abandon the coin and walk away with their profits. Honeyfarm is multiplatform, so I don't think they'd go through all that trouble and audits if they were trying to rugpull. good points! and absolutely yes, do your own research!! Thanks for reading!!