I am thinking of purchasing CB subs not to control content but to simply control the payment of annual membership fees for our charity. So for example, the annual fee is EUR 40 and someone needs to pay it when they join. It should be possible to get reports on when membership is due, who is current, automatic emails to remind them to pay etc.
Some will pay cash so we need a manual means to update that etc..
Everything you describe is doable with the following notes:
+ CBSubs supports online and offline payments. So a member can chose to pay online (via Paypal, credit card, etc) or can chose to pay offline (meaning that the member by some other method makes his payment - e.g., personal check sent in email, cash to treasurer, etc). The offline payment must be recorded in CBSubs backend in order for membership to be activated).
+ Cbsubs currently lacks the marketing emails you are requesting. It will send notifications only on triggered events. E.g., if subscription ends and email will be sent to member, administrator etc. At the moment there is not send reminder type email functionality (but it is planned for next release).
nant