Yes im stacking and i think a lot here are doing that.
Im stacking OWL for more OWLs, because i think its more profitable for the moment than the pair OWL/BUSD, but in the early stage i was stacking to that pair. But after i switch to OWL to received more OWL.
I dont fully understand your question, i use metamask for all.
I used email for signing up, and when I open the OwlDAO staking page and click on connect wallets I get this:

I don't have Ledger, I have Trezor! All other wallets are new to me!
As I wrote, I don't stake them, but I gamble with them!