I fall into the group one category, and will broach this subject from a consumer's standpoint. (Several of the commentators that have posted are people that I've made purchases from in the past, on this name or my 2 others over my 8+ years in SL)
Also, I'll share a couple links to data to support what I'm saying. First, take a look at these two sites:
http://gridsurvey.com/lindex.php
http://dwellonit.taterunino.net/sl-statistical-charts/
Anyways, I find them helpful, rather than worrying about something that right now is just words. More sepcifically, I'd like to point out this tidbit of information:
Monthly Tier Estimates - Private Estates c.US$3.857 Million, Mainland c.US$0.871 MillionThat's just land, of course, but my logic is this, LL has no other cash cow (and we certainly are it's golden goose). They can not afford to let SL close immediately, nor have they mentioned it closing within a timeframe that I think would push me not to make purchases In world. To be honest, as a consumer, I put in about 100 USD a month into SL, sometimes more, it depends on my spending habits. I'm not going to stop buying things for an event that is years away, and certainly not for something untested and unproven. LL will continue to support SL because it has to-until it becomes an expendable venture. Therefore, I'm comfortable with the thousands of RL dollars I put into this game 99.9% of that goes directly to the creators (my tiny spit of land only costs $8 USD a month, and I have a premium membership, so whatever that is). In two years, I won't wear what I have in my inventory now (most likely) anyway, so why should I suffer at the present?
So content creators, please don't worry so much, and keep making beautiful things. There might be an initial backlash, but once we look at the other available choices, those doubters will be back, and as time passes, I'm sure your sales will increase. The ones that leave are the ones that likely didn't invest much in the first place. As for me, the time (years), hours (daily), friends (many) and most importantly to you, money (a lot!) is enough to keep me loyal for many years to come.
Just my .02