Please. $25/month is two-hours of work for a cashier at McDonald's. If think the value of his work is below that, you probably don't have the right priorities to build a startup.
This is akin to asking why Sergey Brin charges for AdWords when he's already a billionaire or why the richest person in the world still makes money off of Windows. Your logic is moronic.
...and Forrester research reports are $800 for a 500-word piece. You're comparing apples to oranges. Economist can charge that low because it has the mass market. If you only subscribed to niche journals, you'd be paying much higher. Andrew's is a niche.
What sort of moronic bullshit is that? Can you not mow your neighbor's lawn for a few hours on a weekend?