I am paying ~$50 a year for a domain name plus Custom Design.
You are not paying removal of RSS Feeds and there is no such upgrade on offer so lets' be cyrstal clear on that.
Given that all upgrades are very specific and what they entitle us to do and what cannot be done when purchased is clearly stated in support documentation, with respect, I mildly and respecfully suggest that IMHO you are barking up the wrong tree.
No one compelled you or I to make the free hosted choice of having a blog here.
No one compelled you or I to purchase any upgrades at all.
I freely chose to purchase upgrades for my blogs based on reading the documentation and comprehending every word of it.
I clearly understand that every upgrade is an offer and that the terms of that offer are found in the support documentation for each upgrade.
I clearly understand that by purchasing any upgarde I have accepted an offer for a time certain, paid valuable consideration for exactly the specific upgrade I purchased as stated in the terms, and that I am entitled to nothing more and/or nothing less than exactly what I contracted with WordPress.com for.
Those are the essentials that detemine any contract ie: offer, terms, time certain, acceptance, payment = contract. Yet every day we Volunteers experience bloggers who appear not to have read the terms of the offers (ugrades), and/or did not comprehend what they read, and/or did not practic due dilligence by getting clarification re: any gray areas in the offer and terms they did not understand, and arrive here in tyhe forums expecting more than what they contracted for. :(