Imps, Pouches, and Secret Recipe reward list

So if you can only feed the imps once every ten minutes, it increases fullness by 20 every time and you have to get it to 1000 MULTIPLE times? Jesus, am i not understanding something or does it take an unnecessary amount of hours >_>

You can feed it more than every 10 minutes, but it only gains closeness every 10 min. (or if you have the heart thingy, you can feed it 10 times extra)