In kraken they say (Darkpool) VIP orders are hidden from the regular traders and this is done so it wouldn't affect the decisions of other. Looks very centralize to its core.
https://docs.google.com/forms/d/e/1FAIpQLSdpSzf3Tja-IeCbxaZ_BmfClORMJHtdywk-CB-dNcavMnZqlw/viewform
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Hiding trades is a type of price manipulation... right? Bitcoin should be traded in a open transparent market, without the intervention of the third party platform where those coins are traded on.
If the intention for this was to reduce the influence on the price, then these traders should rather trade on OTC platforms and not on exchanges that are used to determine the Bitcoin price.