Who is going to be the first manufacturer to make a Fibre Optic purifier?

https://djmelectronics.com/docs/GigaFOILv4%20Data%20Sheet.pdf

this has been a staple for msb owners for some time, vince galbo suggests all owners use this to filter their lan feed

sonore also makes plenty of optical cleansing kit

Fiber Optic not LAN filters!

@jjss49 - I had the Gigafoil v4 a couple of years ago, then tried Network Acoustics (transformer based isolation) filters, and finally moved to a Sonore streamer, optical modules, and fiber.  DJM has this newer streaming-specific filter (link) but I cannot tell from the write-up whether it has an optical component like their Gigafoil v4.

sorry, but what is the need for a fiber optic filter?  I understand the purpose of isolation of copper based data transfer via USB and ethernet through a transceiver into fiber.