The forum rules prohibit discussion of non-Naim power supplies.
We do not permit discussion of modifications to internal components of Naim equipment and this also extends, at the Moderators’ discretion, to products from other manufacturers and electronic DIY discussion. This also applies to discussion of companies who undertake unauthorised modifications to Naim equipment.
Modification extends to the use of 3rd party or home-made power supplies and any cabling that carries DC power between Naim equipment.
The message is a light hearted admonishment of a member, referenced by Drago, for running just such a power supply. This forum is run by Naim, so it’s kinda expected that we all respect that and minimise mentions of things Naim explicitly ask us not to in their rules 
Heck, I feel bad just for explaining it 