Non-negotiable: only one sponsor and one (colored) text link.
(adblock resistant - no JS) on the top of the all pages and on the semiannual newsletter. 140 Unicode characters allowed.
Current (and minimum) price of the main page: $99 per semester.
When the spot is taken, you may propose a price «raise». Two weeks before the end of the semester, the incubent will be informed of the highest raise - if any. The incumbent may «call» the price and keep the spot. The new price will be updated here.