[Gianni Gentles]

I don't think subscriptions would be a good idea at this stage. It then becomes a 'business' and subscribers will demand things as paying customers. It would be the same for a small minority of donators too if donating was an option. I'm personally not against donating, I would like to contribute to this excellent service, but having been on the other side of the fence before I can say it does have its downside and puts pressure on the owners to do things that they might not otherwise want to do, and at a pace they might not have time to do it in.
I'm guessing the owners have fulltime jobs, families, other interests etc. Making this a subscription service would mean them being at the beck and call of their customers, and I don't think enough people would pay up to allow them to make this their fulltime job.
I would like to congratulate them on managing to do all of this for free. There's been a tremendous amount of work put into it and a lot of negotiation with 3rd parties including Kunos themselves, which is no easy task.
I can only hope that the ads cover at least the costs of the servers but I somehow doubt it.