From a Perma.cc Blog Post:
For the last year or so, we’ve been working to understand the potential for Perma to help individuals and institutions outside the academic community combat link rot.
Two things have become clear through our work. First, link rot is a problem for lots of people, not just scholars. Indeed, link rot matters to anyone who cites, refers or links to web pages with the hope that they won’t change or disappear down the road. Second, Perma can help lots of people prevent link rot, whether or not they’re part of academia.
For Perma to continue to serve people outside the academic community, we have to make sure that we use our resources responsibly and focus on users with the greatest need to preserve web sources for public access.
To help us do that more effectively, we’re introducing monthly subscription tiers for people whose Perma usage is not sponsored and supported by academic libraries or other registrars:
Trial Use – Every account gets 10 free links upon registration.
Basic Use – For a $10 monthly fee, accounts can make up to 10 new links per month.
Intermediate Use – For a $25 monthly fee, accounts can make up to 100 new links per month.
Heavy Use – For a $100 monthly fee, accounts can make up to 500 new links per month.
As a result of these changes, accounts no longer will receive 10 free links on a recurring basis each month.
Free, unlimited service remains available for academic users whose Perma usage is supported by their libraries and for usage by courts