Your farm has to be complex enough to need help using it. You either have to make an absolutely massive farm or intentionally make it hard to use/maintain.
You would think that at least one big company finds it in their interest to make sure the product is bug-free, at least enough to compensate core FOSS devs for their time.
It's a problem similar to the tragedy of the commons - why should I pay for something when company X, my competitor to boot, would not only benefit but clearly has more money/uses the software more/whatever other reason I feel justifies washing my hands of it.
