Do Pools Charge Hidden Fees?

[infofront]

Many of us have seen a lot of payout variability when mining between different pools.
Is it possible that some of these "0%" pools are secretly charging fees? Is there any way to tell?

[Wipeout2097]

It is possible and it's also possible pool operators steal coins, but variability is expected. Depends on pool luck. Most pools offer many graphs and the transaction details

Even more when everyone is mining Dogecoin, which gives a variable amount of coins per mined block.

[coin123123]

when pool is not transparent and lacking communication you can't know what happens behind the scenes.

[AtlantisPlatform]

Many of us have seen a lot of payout variability when mining between different pools.
Is it possible that some of these "0%" pools are secretly charging fees? Is there any way to tell?

yes, i believe most pools skim or steal a percentage of the coins.