CCIP-052 - Improve the banner and events process

After a few weeks of the new banner and events process, we have identified some opportunities for process improvement that would greatly help mods and guests:

1. Require the full balance of Moons to be burned before being added to the schedule for both banners and events.
2. Decrease the max banner rental period from 30 days to 14 days
3. Allow banner rentals to include an associated link submission sticky post as an add-on. The cost per day will be equal to the AMA price set by the updated formula in point #5. This is subject to availability like other events which would use that sticky slot, on a "first burn, first reserved basis". Post titles and links are subject to moderator approval according to our normal standards (no malicious redirects, no promising future gains, etc)
4. Banner guests can choose any day to burn moons prior to their start date, and the moon cost is determined by the formula on that day. Then, they can schedule their banner to begin anytime within 60 days. This way, the lock-in point is unambiguous and it is chosen by the guest rather than us. The only pressure is getting on the calendar before someone else reserves those dates. Event guests are quoted based on the day their event poll begins (CCIP 47). This has been how we've doing it already, but makes the policy official.
5. The formula in CCIP-043 is changed to use the average of the past 7 days for unique traffic stats and Moon value. The denominator is also changed to 650 to account for the change from monthly to daily traffic stats. This improves the recency of the data and smooths out the fluctuations. Other CCIP's like 48 which rely on this formula will also be updated. You can view the current banner and event costs in our calculator here. A comparison can be seen here, where the blue link is the historical price with the current formula and the red line is what this new formula would use (keep in mind there has been a lot of price instability lately)
   

https://preview.redd.it/3hpsa1pc7hia1.png?879&format=png&auto=webp&s=30f65ebe6b372b27ded328728fd34b6a21bec8b7

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The problems and pain points we're looking to address are summarized below and elaborated upon in this CCMeta post:

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1. Price fluctuates significantly
2. Quote and price lock-in point is ambiguous
3. Costs depend on old data
4. Low liquidity
5. Guests don't commit
6. Max rental period is too long
7. Guests want clickthrough stats
8. Clickable link is not prominent enough
9. Acquiring Moons is difficult

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