Feedback and wonders - Internet speed x3, screens not auto-starting

[Vadorequest]

Hi!

So, I've bought this DisplayLink PRO which works really great.
I have one MacBook Pro (Apple M1 Pro, 2021), and 4 external screens, so 5 screens in total.

I'm using the ports 1, 2, 3, 4 and the 5th/last USB C port is empty as of now.

I've been surprised by a few things, some good, some bad.

1) Internet speed x3
After branching the DisplayLink PRO using my ethernet cable, the speed has jumped from 885/765Mbps to 2330/2270mbps (up/down). It's almost a x3 speed.

I simply don't understand how that's possible. I've noticed the same increase on 2 different computers (Windows/MacOS). Not that I'm complaining, but it makes me wonder how that's even possible.

Also, the speed increase isn't always present, sometimes during the day it goes back to the previous number (885/765Mbps), during evening/night it's always around x3 (2330/2270mbps), but it also happens during the day, sometimes.

I guess, somehow, the DisplayLink Pro manages to use a part of the network that is unused, but I'd like a more scientific explanation

2) Screens don't auto-turn on
For the 2 screens that are using port 1/2, there is no issue.
But the screens using the DisplayLink feature (3/4) do not come back on when plugging the power cable to the computer, I have to manually unplug/replug the USB C cables connected to the DisplayLink PRO, it's annoying.

It doesn't always happens, it depends on a few things:
- When putting my MacOS to sleep, all screens light up upon going out of sleep, no action needed.
- When uplugging the Power cable of the Mac, I systematically have to replug the cables for USB C 3/4
- When powering down the DisplayLink PRO, I systematically have to replug the cables for USB C 3/4

I'm not sure why it does that, nor how to fix it to have all screens light up automatically without bothering with unplug/replug.

3) Screen 2 displays green "PLUGABLE" image when unplugged, indefinitely
This one is very annoying.
When the HDMI cable to screen 2 (HDMI 2) is plugged, and the DisplayLink PRO is powered, but the Power cable is not connected to any computer, then the Screen 2 shows a green-ish background with Plugable branding, and it doesn't go into sleep mode.

When this happens (typically when I unplug my MacOS to go to work) I also have to power down the DisplayLink PRO so that the screen goes into sleep mode.

4) How much power does the DisplayLink PRO consummes when all devices (computer/screens) are sleeping?
I wonder about this, assuming the computer is 100% charged, does it consummes a lot of power? (should I turn it off?)

I currently don't turn it off (typically during the night, when I could do so) because then I have issue N°2 when waking up and it's annoying.

But I wonder how much that laziness is costing me