About Santiment Beacon-Chain recent Analisys of 46% ETH concentration

Hi all, regarding the recent tweet from Santiment about 46% of ETH validation being controlled by two addressees (https://twitter.com/santimentfeed/status/1570339602346684416), and the rebut from timjanssen claiming that they are only relays (https://twitter.com/thwjanssen89/status/1570426961411067904).

The top address from santiment data feed is actually Lido's "Execution Layer Rewards Vault": 0x388C818CA8B9251b393131C08a736A67ccB19297. I've understood that the vault cannot be considered a validator by itself, and that it merely collects and aggregates rewards from each validator on the execution layer and then redistribuites it to stETH holders. Alas, the official documentation from Lido is amazing: https://github.com/lidofinance/lido-improvement-proposals/blob/develop/LIPS/lip-12.md

I would like to know if anyone here has any insight as to how santiment consolidated the information, and to why they would classify the vault itself as a node operator? I tried to find more information as to how santiment collected and processed the beacon-chain data, but I could not find any...