I do see your point henbane but let me try to explain my point of view, as someone who has posted a few times expressing irritation at this and other similar competition threads.
To me gransnet feels like a family. A very large family, where you will 'get to know' some members more than others, you will clash with people, sometimes things might get very heated, but there is also a lot of support in times of trouble. You can stop posting for long periods but always feel able to pop back in when you want to. I would also add that new posters are usually given a warm welcome.
The competition threads attract a completely different type of audience. Yes, sometimes regular posters contribute, but the main entrants are usually names you have never seen before and will never see again. It makes me feel, rightly or wrongly, as if the family has decided to have a party with goodies on offer (I am well aware that they are not our goodies) and the whole town has decided to gatecrash the party, take what they can and leave. I am aware that gransnet relies on competition threads for sponsorship, and if posters would show some commitment to the site I wouldn't feel it was an issue, but mostly they don't. So that, plus the fact that the competitions seem to run and run for ever, dominate the active threads, and are often for companies such as L'Oreal which I despise, are what really get on my nerves. But I will try very hard to ignore them in future.