From my personal impression people don't like to hear about it. SL-Usership is free, so people usually expect most things associated with it as free as well. Developing games is a very long and complicated process however and from the other perspective, the one of content creators, SL is not free at all. Server costs, cost of proper tools and resources, not to mention all the time and energy that goes into such projects. All of that has to be accounted for and SL offers various solutions to do just that. In my opinion there's two ways to generate income in online gaming: subscription based models and micropayments. Subscription based models work like World of Warcraft for example, as long as you play, you pay a fee on a regular basis. Personally I have not seen this model put to use in SL very successfully so far, but I would be very interested to hear if someone knows any good examples. The other way is by micropayments, which means selling small amounts of content to you, everything you need or want int he context of the game, you have to pay for. Keep in mind though that while your personal interest in a game might fade away, the gamecreator will still have to cover the running costs to keep the game running for everyone. As a result he is mostly dependant on gaining new players all the time, which is ultimately why you experience a lot of SL games as some sort of social scam to drag in more and more people. The question is, what do the players prefer? I know that if you look at SL today the answer is clear, but maybe there are new and different ways?