I think there are a number of services where you could highlight inequality of access to services based on wealth – using high-speed broadband, hosting your own website, attending conferences, etc. etc.

I think App.net is getting an unfair share of sour grapes due to the “I have $50” meme — in my opinion – it’s not paying for exclusive access to a members club – it’s about supporting a fledgling service where the odds are stacked against it.

It’s more of an ongoing continuation of Kickstarter funding than “pay to play”