If you do it by hand, article not a person and it is about 15 a week? A day? Every 2 weeks?

I wonder how big the difference in payout is if you upvote at 100% and another 2 times. I cannot imagine it makes such a huge difference in payout. I can also not imagine you read/find 15 posts that fast doing it the old fashioned way.

If I gave a 100% upvote I do it between 100-85%. If that is not possible I wait for some hours or a day.

Instead you could also consider to sponsor some of your good writers with a daily upvote for a week as a "bonus".

Great to hear the account is doing well. Happy Monday