I essentially have a non-existent newsletter at the moment with 3,000 sign-ups thus far. I'm looking at a schedule of a bi-weekly release just to get myself into the groove of curating content on a scheduled basis; but I'm unsure how to actually monetize it beyond allowing for businesses/events to purchase ad space in the form of either a short sponsored article (photos included), a hyperlinked banner, or a 1:1 photo/logo placement in a grid.
I can't really find much to guide me along the creation of a monetization plan, nor how much I should be charging for X amount of time per ad placement.
What exactly does a sponsorship in a newsletter look like?