You are quoting a post that is over 2 years and a lot can change in that time e.g. The KLM lounge 52 is being refurbished and access is being limited. In any case your question would best be asked of the KLM board.
and this page on the KLM website makes no mention of such access if not flying sky team
https://www.klm.com/travel/gb_en/pre...ess_policy.htm
Last edited by UKtravelbear; Jul 17, 2018 at 11:22 pm