Re: Ad free please
Well, you could easily anonymise the payment stuff through a clearing house. I'm just thinking of the integration of paywalls in the browser as a way of lowering the barrier to entry.
Visit The Register initially for free then after a while it's used up and you get offered conditional access: single article, monthly sub, yearly, etc. Or ad-supported access with ad-blockers disabled for that site.
To be honest I'd be more worried about abuse of the service by unscrupulous websites than by the data slurping stuff.