Is it possible to have the pool delegated only to those logged in to save idle resources?

AFAIK no specifics are known yet about whether there will be a colldown period (like with SP delegations) but there shouldn’t be since it’s ‘used or available RC’.

I don’t see why a SMT couldn’t write an algo which controls that distribution. Personally I would write it based on activity (most active ones get more, especially if they get upvoted [within SMT]). The different use cases in the SMT whitepaper specifically mention comments and forums, activity is a factor for that type of users.

But I’m not sure whether it will be possible to do it 24/7 dynamically for every single user. Technically it could be done but it depends the restrictions which we don’t yet know.