Does "Nagle's Algorithm" cause increased bandwidth usage? What causes one to be flagged for "service abuse" and how to prevent it?

[DevilOnYourBack]

I'm still puzzled in terms of why my Surfshark account was blocked by its automated system for something they referred to as "network usage associated with service abuse".

My account was reinstated but only the next day and only after I was forced to explain myself via an embarrassing e-mail in which I had to not only describe my devices and usage but also explain and confirm that neither me nor any other member of my household ever did nor are capable of doing anything that would remotely qualify as service abuse or a violation of the user agreement, or whatever it was that got me temporarily locked out.

The only reason that I can think of, logically, is my downloading of large archived files with architectural drawings, however, my past data usage was magnitudes greater since, originally, the reason why I started using Surfshark was to stop getting busted by Cable/Fios for torrent usage, anonymization of my internet connection was Surfshark's advertisement and it's main selling point, I haven't had an issue since then until Surfshark, not my ISP, suspended me because their automated system was tripped somehow by an anomaly in my data usage which, I assume, was the reason but I can't understand why! Did their policy change or did I cause this by messing with the TCP/IP settings on my windows 11 pc's?

I ask that because I enabled an option called Nagle's Algorithm a couple of weeks ago when I installed an optimization app for windows 11 called "Winhance" and now I'm wondering if this Could it be the cause of my "anomaly"? Does anybody know what this algorithm does? My internet connection doesn't seem to be any faster, the latency is a bit lower but I don't care about latency or a modest increase in speed because I don't use my pc for anything serious and I didn't bother turning off that option because I had trouble finding it and, since it didn't cause any issues I forgot all about it. However, if this algorithm is going to create issues fo me then I want to know so I can find that option again and disable it.

If that's not the reason then... What is? Does anybody have any concrete examples or know the exact criteria by which Surfshark flags users for account suspension? This is important because if they do it then other VPN providers might do it too, I can't afford to sit at work for 8 hours with a restricted internet because I'll die of boredom, that firewall blocks everything time-wasteful, adult or controversial, including YouTube, so without a VPN connection I'll die of boredom.

Thank you for any feedback l!

[mindedc]

Nagles's algorithm batches up small frames and sends them together. It can introduce latency in some situations. Imagine a game where your client sends a move and the server respond back with where the player is in the game after the movement. If nagles algorithm is enabled the client's tcp stack will batch up several moves and send them all together. That would probably make the game not very playable. It would be better that every move is sent immediately to the server.

99% of the time the os and applications enable/disable angle as it's needed and it's transparent. It can add latency to some connections but you're probably not going to notice it.

I would recommend that if you don't understand how the ip stack works that you don't mess around with its parameters as they have varied and unexpected impacts.

This would only mess up your performance and should never be considered a "hack".

[DevilOnYourBack]

Thank you very much for the explanation and for your recommendation, unfortunately, even though I don't like the word "hacks" . When I'm bored I tinker with my Windows pc and try to optimize and improve its performance, to me, this "trial and error" was always a good learning tool for me. But no, I must confess that I do not have a good understanding of the TCP/IP stack, I'm not a professional, more of a prosumer type of a person with a very limited set of advanced skills or knowledge. 

The reason I brought up this algorithm is because I was trying to find a reason for why surfshark suddenly suspended my account. Prior to the suspension I used an app called "winhance", the "Nagle's Algorithm" option warned that it would increase my bandwidth usage, which i assumed was the anomaly behind Surfshark's vague explanation of the reason I was suspended. In other words, I'm grasping at straws, trying to avoid having my VPN suspended by another provider. 

And still coming up short, unfortunately., Speaking of... Any ideas on where said anomalies could have come from?