Every time a user performs a transaction on The Graph like delegating and indexing, there is a cost to it. “With this transfer to Artbitrum, those costs are lower. So we expect that there will likely be more indexers that spin up on the network [and] more delegators that get involved because that barrier to entry is lower, the cost isn’t so high,” Kline told CoinDesk.
Source: https://www.coindesk.com/tech/2023/06/14/the-graph-starts-migrating-its-settlement-layer-to-arbitrum-from-ethereum/?utm_medium=referral&utm_source=rss&utm_campaign=headlines