Just my 2 cents...
Being in my first year of a premium member, the reason for becoming one still stands. I am happy to pay a reasonable amount of money to support a company that gives me a challenging environment. A place to meet amazing people from all over the world, so I can broaden my horizons. All that through an interface that enables the creativity of people that choose to participate in it.
If that little amount of money enables LL to keep in business for the next year, so I can enjoy SL further, then I consider this money well spent.
And on 50% off for new customers: so what! Do you react the same way when your cell provider does a marketing campaign, and gives new customers 6 months for free?