CCIP-083 - Clarify Rules for Sponsored Polls

Although Sponsored Polls from CCIP-063 have not yet been used on CC. I think they have a lot of potential. They just need a few rule Clarifications/Modifications.

I am proposing the following three rule changes or clarifications:

1. Sponsored Polls are pinned for the extension of their purchase period.
2. Sponsored Polls have an optional Comment Lock that can be placed. If comments are enabled the purchaser is required to have minimum engagement.
3. Clarify that if an entity wants to rent for 72 hours - they can do up to 3 questions (one question every 24 hours).

Reason for #1

Users are able to conduct polls on CC. Getting a sponsored Poll through the CC Ecosystem provides no additional benefit for the entity if it is not pinned.

Reason for #2

Sponsored Poll writers may not want users discussing the results and guessing the purpose of the poll. If they want to disable comments they can.

If comments are enabled Sponsored Polls are not intended as a cheap way to have an AMA. The entity conducting the poll must have minimum engagement in the comments

Reason for #3

Currently a Sponsor can purchase a sponsored poll slot for 24 or 72 hours. If they choose 72 hours they might not want one question. As such we are clarifying entities can ask up to one question every 24 hours. So 3 questions on a 72 hour rental period.

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These Changes are Aimed to make Sponsored Polls more desirable for potential entities.

Snapshot poll link: https://snapshot.org/#/cryptomods.eth/proposal/0x05d69dd00591c4015ef8ddffb152038a6e5d6feed84728c58117a055129a1a1e

poll by u/gabester