This article has become outdated and we recommend viewing its new version "PVS-Studio ROI".
Link to the new artilce: PVS-Studio ROI.
Unfortunately, we must make the PVS-Studio 4.00 static analyzer completely paid. We intended to make only the set of 64-bit rules paid while keeping the general analysis and OpenMP-software analysis free. But the world is stern and we've found no support.