How long have you been using the splitter? (I wonder about the likelihood of the provider finding out- though it shouldn’t be a problem to look out and remove it if I see one of their trucks in my driveway.)
Could be a basic service they don’t advertise when you pay for internet only but...been doing for nearly a year now with no issues. Wire is in my living room and, just like the late 80’s when you would split a signal to have cable on multiple TV thruout the house, I used one of my old splitters to do it.
They’ll find out. Trust me.
We have Cable One.
I dropped the cable TV part of my service but kept the high speed Internet portion of the service a few years back.
Since we live close to the cable office, I drove over to their office to make the request to drop service.
The lady behind the counter went apoplectic and started accusing me of trying to defraud them because, apparently, Cable One had no real way of letting you keep your high speed Internet and cutting off basic cable access at the same time plus they had NO way to monitor if you were using the basic cable.
The solution that we agreed upon was for them to send a tech person home with me to crawl up into my attic and disconnect the cable TV cord from the splitter.
He showed me what he did, simply unscrewed the cable cord from the splitter and left the computer cord connected.
If I wanted basic cable, I would simply have to reconnect the cord to the splitter but I have not bothered.
Of course, I am not a cable TV expert and do not know how all systems work for all companies but assume that they all basically work the same way.
In any case, I currently use Apple TV with NetFlix and have been saving between 100 to 200 dollars a month for several years (more like 400 a month if you include dropping the phone service for Internet Phone. My wife's family lives in Japan and she needed a land line to make international calls). I just got a chromecast for $35 and will probably be using that more than Apple TV from now on since it is easier to use my computer to type in the search menu. Also the Apple TV will not let you watch all programs on YouTube and Chromecast will. Apparently, YouTube recognizes Apple TV as a TV and will not let you watch programs that have TV licensing issues. Only problem with chromecast is that it does not support Android yet despite what it says on the box. It would be nice to control it via my Smart Phone or Android Table rather than lugging my laptop around.
Best of luck and Merry Christmas!