leo.voter rewards users in LEO if they delegate Hive Power. As far as I know, it does not reward users if they are delegating LEO power.
I don't know what onealfa does with his delegations, but I would assume the same with leo.voter.
So in this case, if you would like to earn passive rewards from basically HODLing LEO Power, the right way to do would be to delegate it to @meowcurator (preferably 10 LP or more, as you said) and observing @meowcurator sending you rewards every day.