chore: add exponential rebate tldr (#470)

Author: alex-pakalniskis

website/pages/en/network/indexing.mdx

@@ -81,7 +81,7 @@ Disputes can be viewed in the UI in an Indexer's profile page under the `Dispute
 
 ### What are query fee rebates and when are they distributed?
 
-Query fees are collected by the gateway and distributed to indexers according to the exponential rebate function (see GIP [here](https://forum.thegraph.com/t/gip-0051-exponential-query-fee-rebates-for-indexers/4162)).
+Query fees are collected by the gateway and distributed to indexers according to the exponential rebate function (see GIP [here](https://forum.thegraph.com/t/gip-0051-exponential-query-fee-rebates-for-indexers/4162)). The exponential rebate function is proposed as a way to ensure indexers achieve the best outcome by faithfully serving queries. It works by incentivizing Indexers to allocate a large amount of stake (which can be slashed for erring when serving a query) relative to the amount of query fees they may collect.
 
 Once an allocation has been closed the rebates are available to be claimed by the Indexer. Upon claiming, the query fee rebates are distributed to the Indexer and their Delegators based on the query fee cut and the exponential rebate function.