It will be part of how the site is financed. Someone has to pay for the costs. If MN were not paid for this story as such they benefit from it as more people visit and see the adverts here which increases their income.
And more visitors also means more members to talk to.
I suspect what Geraldine actually said is what Justine's been saying -- that a reasonable number of posters have suggested that it may be better to catch it now rather than in a second wave of pandemic later in the year. Which people have been saying, just in a "so I won't hide in the cupboard under the stairs with a duvet over my head" way rather than in a "so I'll organise a swine flu party right away" way.
I have no problem with Justine, Geraldine, et al. giving quotes that are true, but the quotes are far-fetched at best. I suppose "actually, mumsnetters are being eminently sensible" just isn't as exciting.
However, I accept that Geraldine is saying her message got 'garbled'.