USB "re-clocking" and isolating devices for the audiophile market

There are quite a few of these "audiophile" devices on the market.
It's unclear what the manuf of these devices means by "re-clocking". Are they simply reclocking the I2S lines? Etc.
And what exactly is "isolating" ?
Examples of such products include the Schiit WYRD USB Filter, and the very $$
https://jaguaraudio.com/product/innos-phoenix-reclocker/
This one from UPTone Audio has received quite a bit of attention, aslo:
https://uptoneaudio.com/products/iso-regen

Photos of < $150.00 devices:




See:
https://www.aliexpress.us/item/3256801113498445.html
https://www.kitsunehifi.com/product/holo-audio-titanis-active-usb-processor/
https://www.audiosciencereview.com/...rements-of-schiit-wyrd-usb-filter.5717/page-5
https://forum.audiogon.com/discussions/which-usb-reclocker-is-as-good-as-the-innuos-phoenix-usb