Re: Here's to hoping Britain does become a major anti-DRM supplier.
DRM in its current form is a pretty poor way of reducing piracy, but even a 20% improvement is probably worth having.
Cost-benefit? "probably worth" would depend on cost versus putting minor obstacles in front of people who would never subscribe anyway. Most people who engage in this stuff won't suddenly buy your most expensive package - and that's where the logic falls over.
The real question is if DRM doesn't exist what percentage of current subscribers would you lose and how pervasive would piracy be. I don't know and that's probably what scares them; what will we lose versus what will we gain.