There's a lot of assumptions here, which won't always be correct.

Let's take an example. There's a wonderful lady on here who has upgraded. She's a former prostitute (she writes about it) and she won't mind me saying she probably wouldn't describe herself as classy, or middle income. She's broke. But she paid for friend membership. I think she hoped it would improve her own income on the platform. I don't think it has, sadly.

Some of what you say might be true. But all sorts of people choose to upgrade (or not) for all sorts of reasons.

I'm not seeing much evidence of a two tier system. I hope it's not a big issue on here.