I have received 40% off codes mid- to end-of-the year before, but they weren't offered in such large numbers as they are being now. I don't even remember them being mentioned on the DIS. The DIS is probably the most informed Disney community, but really represent a small number of people who go to Disney. Anyhow...
It is my opinion that there will not be another 40% code for the rest of the year considering the wide range of dates that this offer entails. Unless, of course, it is for a package. Other codes offered, if offered, throughout the rest of the year will probably be for a much lesser amount off.