@Twisticles & @109matt appreciate that it may work for you, but with all due respect this thread is about IFTTT and Oauth not working. If it isn’t critical for your setup then that’s all good and it meets your needs. It sounds like you were early adopters if you have a V1 hub from the US, so when you bought it, you knew some things would be a little less than ideal and that was factored in with your purchasing decision.
There are lots of solutions available, ranging from very nice and complete solutions like the Fibaro Home Centre 2 all the way down to home-brew but few offering the ‘Connect your world’ solution ST are, if I was content with the limited functionality currently offered i may have bought something else.
Incidentally, I’m not inexperienced in home automation, with my previous house having a complete solution from Cytech (The Comfort System) which was amazing powerful but not extensible in the same way ST claim to be (the main reason I am even looking at it). I had previously home-brewed connectivity from Comfort to external devices and services but wanted to use ST to provide something more out of the box [appreciating i will need to create the device interface from Comfort to ST] in my new house.
Your logic of ‘it works for me, therefore it works’ isn’t fair on all those people for whom it doesn’t work. There was an analogy earlier about a TV. If you bought a Samsung TV and it only tuned into BBC, that would be fine if all you wanted to watch was BBC. But for a lot of people, if not most of them, the TV would be broken if it couldn’t receive the other channels and few would argue that therefore the TV is not fit for purpose.
TLDR: It’s not doing what it claims to be able to do, hasn’t done so since it was officially launched in the market and therefore as it stands at the moment, the marketing is misleading and it isn’t fit for purpose.