Aha! I suspected as much.
A while ago I had some interest in the whole spider silk conundrum with the intent to farm the silk. I figured they would cut down on the cannibalism if they just had an overwhelming amount of food to eat (other then themselves). Producing web is a very protein intensive task and spiders need to eat quite a bit to keep those webs up, but if they have more than enough to eat why should they fight each other for food?
Of course, this may just be this one species and it"s silly to jump to conclusions such as: it would work with other spiders like golden orb weavers... I"d love to run some tests though.