In reply to Neil Williams:
> My question was more what's different about it (other than it being built onto the side of a rock face, but I'm not quite sure why that should affect its profitability)?
I climb regularly at Ratho and it's hard to compare to other walls. Once you've climbed there for a while it's easy to see how it could stuggle.
As someone else has mentioned, it's out of town, and Edinbrugh is a nightmare to drive through at rush hour. Many people just opt to climb at the walls nearer the center of Edinburgh as it's more convenient. I live in Stirling and I'd bet I could get there faster than someone coming from the center of Edinburgh at peak times.
The design of the stucture is great for accommodating huge walls and large amounts of people for international events, but this size and design (essentially a large tent over a quarry) comes with many drawbacks. Firstly, it's absolutly freezing in the winter. In some conditions it can be colder inside than outside. It can be so cold that your hands are completely numb. In summer the reverse is a problem, however many indoor walls stuggle with heat. There's also a bit of a dampness issue within Ratho. Basically, conditions matter and you have to account for them before making a trip.
The size of the walls also mean that stripping routes and setting new routes is large expense. This can lead to routes being up probably a bit longer than they should. Although this isn't always the case. Because of this if you're climbing in a certain grade range it's and going weekly then you can easily run out of routes to climb before a reset.
Lastly, Ratho's bouldering facilities are somewhat substandard compared to the lead walls. If this was improved it would be a real bonus, however I can see why they might not be as inclined. Competing with the likes of Eden and Alien would be hard.
All these factors make it a less friendly wall for that after work social climb that many people are after.
All that said, Ratho is without a doubt one of the best walls anywhere and for all us central belt climbers we're unbelievably lucky to have such a facility on our doorsteps. The length/variety of the walls combined with the quality of the setting is unmatched at any wall I’ve climbed at in the UK.