The real problem with fansubs is that they remain available after a property has been released. It's not like the 11s can't get their own raws, and nobody here is losing money if they can't sell anything. Fansubs become basically bootlegs once a title has been licenced. So that's what makes it hard for companies to make a profit; they have to go up against an existing black market.
The few benefits of fansubs are outweighed by this.
The issue is really a greater piracy "problem" with the internet. While there will always be a small group of truely criminal infringers, for the most part the "crime" is an issue of economy. If some guys with a few computers can do it in a few days, why does it take "big" companies so long? They have an outdated business model.
At one time, it seemed BT traffic (from video downloads) was the big hog of bandwidth. Big studios wised up, and figured that if people were going to watch their stuff over the internet anyway, they may as well help them. Now we have southpartstudios.com
. Now video traffic is the big hog.
Fansubbing will continue as long as there is a real demand for it. For all the pre-licencing that goes on these days, you'd think some of the anime companies would be able to start work early.