Second Life is doing OK. User count about 60%-70% of peak. More concurrent users than anybody else in the virtual world space except Roblox. Profitable. The owner says "it's a cash machine". The business model is straightforward - free to play, charge to rent out virtual land, take a small commission on item sales.

It's about the only thing in this space that turns a profit. Roblox has a huge user count, but loses huge amounts of money. Since they did an IPO, everyone gets to look at their terrible numbers.