i'm not seeing any mention of trials for users.

let's assume i'm using this and churning out valuable content every week / day / whatever.

Someone hears about my thing and thinks "that sounds nifty. Not sure it's worth $x a month though"

I'd want some way for folks to be able to "try before you buy" let them get some specified number of newsletters before the system says "hey, you've been reading this newsletter for Y weeks now but we're at the end of your trial. <compelling message from author> To keep receiving this letter please <initiate payment process>."