The small print is there to cover them, and protect them from the irate individual who demands they supply it even though there may genuinely be none left, and is really of more relevance to those ordering online or by mail.
The offer is made either "subject to availability" or "first come, first served" basis. If you fire off a written application or do it online you have no way of knowing if the item is available. If you phone however, you are likely to ask before you order "Is the item available?"
If it isn't you are unlikely to proceed unless a reasonable alternative is offered. However if you are verbally told yes, only to be later told, actually that's no, then they are in breach of contract, and you can cancel.
Calls are recorded by most companies and any decent company will access that information and find in your favour. To avoid any doubt either record the call yourself or ask for written confirmation of your verbal agreement to be sent immediately.
I subscribed to Trail for a number of years, and always received the subscription gift I wanted no problems. In fact sometimes when it was time to resubscribe I found you could defer from the current offer until one I fancied came along.
Isn't there this "propsal for debate" thingy on line? Set up by Camaron, 10 Downing Street.
You get 10,000 replies and it has to be debated in the Commons?
So if most of us on this forum and others I/am sure you take part in, or post links to the like of BMC, MCofS, Ramblers, Backpacking Club, etc. took part. We would get enough to have it 'debated' in the Commons again.
I went to set one up and found one already in place, sadly with only 4 signatures.
I'l sign it tomorrow and begin sharing (can't do it from this pc), but if anyone wants to get started here's the link HERE.
Please feel free to use the image above which is from my blog when sharing on facebook if you want.