Re: Paid membership and subscription plugins
S2 Member looks like a great plugin.
I have to disagree with you about WPMUDEV though. Their plugins are amongst the best in the business.
My membership with WPMUDEV has saved me thousands upon thousands of dollars worth of development costs.
If only I found them sooner. I run a paid membership with the Supporter plugin which integrates with dozens of other plugins.
They will have a membership plugin real soon as well.