I tried once, throwing my LST into the staking pool and running it for a few days, then casually wrote a small script to monitor event logs to see who was actually sending me "rewards." Basically, there are only two sources: one is the original staking rewards, and the other is the incentives/points/tokens issued by the new protocol to attract TVL... The latter feels very "nested," no wonder recent criticisms about shared security and yield stacking. The risks are pretty straightforward: LST itself being de-pegged, the layer of contracts/permissions/upgrades for re-staking, plus the penalty transfer if AVS/services have issues—what you think is earning interest might actually be exposing you to tail risks. Anyway, I eventually pulled out, leaving a watchlist to keep collecting logs, just to play it safe.