Power feeding is when your snake is finishing one rodent then you sitck another its its mouth so it just keeps eating and ends up eating 2 meals (rodents). Over feeding is when you feed something crazy like 2 rats 3 times a week or something like that, simply bc your snake will eat all of it and you wanna get them up to weight faster. I would NOT reccomend either of these methods except for extreme rare cases where it could be seen as understandable.
(these definitions are how i understood it, though i could be wrong.)

What jinx does by restarting over after a month of refusals is not even close to powerfeeding. Even if he restarted his process 1 week after a refusal i would still not consider it powerfeeding. Doing whatever it takes to get your snake to eat once a week isnt a bad thing at all imo, especially since theres sooo many things that a bp can use as an excuse to refuse a meal lol. If my snakes only ate while Rihanna was playing in the background, you can bet your a$$ i would be jamming out to her every feeding day.