When it comes to paysites and the 'advances' in technology used in them?

The thing that immediately comes to mind is DRM, at one time it was touted as a great tool for paysites, these days it seems we are hearing less and less good things about the effects of DRM.

Also, cross-sells on the join page, again they used to be talked about as a great tool to help program owners make more money from their traffic but again, these days, it seems they are frowned upon by most.

What other tools are being used on paysites that are meant to help site owners but actually end up having an adverse effect on sales and retention that you folks can think of?

Regards,

Lee