Well I just expect the vast number of users who barely interact to have the collective advantage. So I treat it as just a bit of fun.
If I really want an item, I buy it using $ money as its not worth the effort or emotion to attempt to get what you need with such low odds.
If is an item I do like but don’t really need I’ll push the maximum, knowing even when its USA-only my chances likely in 20% range.
If it is an item I’d expect useful to gift to someone, I’d submit 1 entry knowing my chances are around 1%.
As none of the probabilities are high with Powerdraw, it complements using money where your probabilities are nearer to 100%.
Your % / effort is best with an item you know you want sometime soon and wait for a brief extra discount to appear.