Thank you for the info and that was something I thought about long ago, but my local corp monopoly [Frontier] is not nearly as sophisticated to do that, thankfully. I tested this a while back by uploading a 14GB file to a server of mine many hours drive away. I kept track of the upload speed and it stayed consistent [this was prior to hurricane Helene hitting and doing major damage to the DSL infrastructure here - glad it has sped up fiber roll out, but I am still a few weeks or months away from them turning it on for my house; meanwhile download/upload speeds are all over the place].
I live very remotely in the mountains with nobody near me that also has internet, though the POT [I think that’s the acronym] that residents plug into does have other users. I typically pause Backblaze until I go to bed these days due to the limited bandwidth. Before I could keep it running 24/7, but post hurricane [this was late Sept 2024!], I can not.
Xfinity is insane for punishing all users just because one or a few in your area also use BT or play games or use Zoom. I mean, other than BT, those other things are what people do on the internet these days, legit!
I really do wish it was my issue, but I have talked to local techs [the people on the phone are several states away and sometimes overseas], and they have said it is quite frankly a miracle that DSL is still working as it has since the storm hit in my area as the damage is major; in June they contracted folks out to run fiber and they did that to my house, but there’s still several things that have to be done before they can turn that on.
I often use my iPhone and its 1 bar of LTE as a hotspot to do basic tasks like use Endicia [to print my shipping labels], as there’s often major lag in connections. But some days things seem to work fine. It doesn’t reset on a certain day, and from what techs told me, they don’t filter anything, but they did say if I use BT, I should use a VPN. 
[I have used BT on archive.org w/o a VPN, but it was not for downloading anything shady!].
Part of me is just thinking to do GS sync troubleshooting after I have fiber and move into modern speeds [for the record, my DSL is supposed to be 20 Mbps down, 2 Mbps up - pre-hurricane it was 17/1.7, post hurricane- on the best day it’s 13 down, .5 up, but usually closer to 2 down and .1 up].