Hello Brock,
Support for Akeeba Subscriptions stopped on June 2014, as announced in November 2013. I am not sure where the January 2015 came from? Here's our announcement which addresses your questions: https://www.akeebabackup.com/home/news/1534-the-future-of-akeebasubs.html
2. You can already do that, as long as you log in to the site before purchasing an additional subscription or renewal. Otherwise it would be a TREMENDOUS security risk. Think about it. If I knew your email address and had some money I could hijack your account with a different password. I could then immediately log in and change the email address. Afterwards I could simply look into your account's private information (e.g. your private tickets) which would be a treasure trove of information, maybe containing even passwords to your site.
As for subscriptions not linked to a Joomla! user account, it makes no sense. Akeeba Subscriptions is a subscriptions software, i.e. lets you buy time limited access to specific Joomla! user groups. How could that ever be possible without having a Joomla! account? Maybe you are looking for a CRM software instead?
Nicholas K. Dionysopoulos
Lead Developer and Director
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