As an independent web developer who manages non-profit sites, removing the cap on .org domain registrations could have potentially catastrophic consequences for the organizations for whom I manage their sites. While the domain name market may have matured, that doesn't mean that the organizations that utilize that market have any extra capital to spend on domain names. A 10% yearly increase can be placed appropriately within a budget, but an it's-anyone's-guess increase every year is unsustainable.
Please remove the language from the renewal that removes the cap on yearly price increases.