Only one nitpick stands out in the current text:
You can change the frequency.
might better become something like:
From your user preferences page, you can change how often you receive the newsletter, or disable it altogether.
Not making this explicit can cause an user accustomed to centralized platforms with abusive T&Cs to suspect a dark pattern there, even though there actually isn’t one: “does omitting ‘you can disable it’ mean signing up subscribes me to a non-revokable newsletter or something?”
But yeah, it’s a nit. 
OTOH, my fundamental objection to the text in the current form is that it’s not immediately obvious from it what we offer… Because we don’t really know yet!
My rationale for this, and associated proposal for a user-retention strategy based on offering users the chance to participate in a space which does not preemptively defend itself from its users – is elaborated on in the context of a specific example (namely: “how should drive-by self-promotion be treated”) over here: