It all depends on what you're looking for. My SL home IS on a private estate, and has been for more than 10 years. However, the small Linden home is perfect for my spouse who rarely comes in but does want something that is his (I've been renting him a skybox), and I'm considering using a 512 lot on mainland for a small studio. But even without those, with Premium at $72/year and a 300L stipend (which assuming a conversion of $1 = 250L or $62.40/year), the cost of Premium comes down to less than $10/year. I won't count the 1000L bonus since that's for the first year only, but that $10 is worth it to me to have the extra group space and priority access to full events (as a blogger, those are both extremely positive advantages). Everyone has their own wants, needs, and preferences. If these don't meet yours, it's not a scam, it's just not the right fit.