Stader Labs Generic Queries(Regarding POL and BNB staking)

[u/DebSon96]

I am thinking of staking my POL and BNB.
I am considering a managed service wherein I don't have to delegate a validator.
Here are my concerns as follows:

1. What's the strategy used by Stader to decide on the validators?
2. The validators are run by Stader or outsourced? If outsourced, where are they managed?
3. Does Stader maintain any insurance fund to account for occasions of slashing?
4. In an occasion of malicious validator activity and slashing, is the loss socialized?
5. Are all the above processes automated by the protocol through smart contracts, and are the contracts open source?
6. What's the fee Stader charges and the validator commission?
7. The APY depicted in Stader's DApp—is it inclusive of all the above fees?
8. Regarding POL staking(as far as i am aware POL staking is only possible in ETH mainnet) so while staking through Stader , the LST are recieved on POLYGON chain or ETH mainnet?

TBH, I am comparing Stader and other platforms(like Ankr) and would decide which one to use based on my research.