As the starter of the previous thread I thought I would mention what my group of friends did over the weekend because of the reminiscing about our previous inability to read the rule book. We tried this method over a couple of games and saw some interesting results.
Whereas when we first played the game we only bought the Curses when we had +Buy. This makes Woodcutter much, much stronger. And it makes Witch much, much weaker--as it does to other cursing attacks. In fact I don't think anyone bought a cursing attack the entire time we played.
As I mentioned on the previous thread, we originally played that we could just again place the curse into an opponent's discard pile when it came up in your 5 card draw. This left a slight discouragement from buying and giving curses because most often the person giving out the curses at the beginning of the game would be the one getting them. We played this way and we played a few where the curses remained in the pile after receiving them. In the first situation, few curses were bought out of fear from getting those curses back--that is slowing down all three opponents' turns for one turn is not worth getting 3 curses into your hand, especially early in the game. There were a couple of hands drawn that had 3+ curses in them.
In the second scenario people bought curses much faster, and as GenoIkari mentions skipping a turn completely to only buy and give a curse occurred a couple of times. A friend tried a strategy where he opened +curse, +curse and got hammered because that left him behind in then next turns and because we all started targeting him with our curses.
In general we determined that we like Donald's version of curses much more. Which is why he is the genius and why we aren't.