cssdude: If that's correct, then can you guys and gals suggest any other way to save data, specifically on Pandora and YouTube TV? I've already asked both, and they have no way of limiting data on their ends.
Pretty sure you already know some of what I will post here, here it goes anyway to cover the topic.
What your router says VS other things... when you download let's say 100MB, it's not exactly 100MB. Your computer, router, etc will be constantly sending confirmation packets, it's like send, receive, wait... yes, confirmed. And so on. This might also be impacted on what you are downloading or how (peer to peer, browser, etc). Some packets have to be downloaded again sometimes, and anyway, your data transfer (depending where you look) might be counting upload + download.
I use a hotspot at home/office (cell phone), I have a amazingly cheap option that was upgraded and etc etc it's amazingly cheap and fast. I take care of how I use the web on my laptop / tablet / ipad / tv, etc. The place where I have most control it's on the laptop, yes an adblocker allows great savings, no kidding. You can also block specific stuff (non ads) and save more data. On tablets and smartphones I often use Opera Mini or anything saving data. It works. Having a router depending on your model, you can configure it to block ads, specific urls, tracking stuff, and
even limit the download speed, this way those "automatically configuring services" that "detect" your speed and serve 720 or 1080 video will not have a chance.
The problem is video., there is little you can do there. You can try to config your services to provide you with 240 / 360 resolution, etc. Some services will not respect your setting and serve you high resolution, you can get some help there with your router configuration limiting the download speed as mentioned above.
Other than that: download stuff instead of using streaming. Your options might be diverse (or not) depending what you consume. You can find lots of movies at different resolutions online for download, and some options are underground (not exactly legal) but you can download them, sometimes getting a 600mb movie with option for a 800mb instead of the usual 1.5gigs. But it depends on you, what you consume and your nethiquete (copyright policies, etc). I personally download all the content I can and then watch it, RARELY watch streaming video, and yes I save a lot of data. And yes there are services to download movies or videos from video portals, and there are also browser extensions.
There are some browsers offering video compression (Opera Mini did, UC Browser offered it too), I'm not up to date on this because I stopped experimenting with it a while a go. What I mention here comes from personal experimenting, not that I'm telling people to download free movies and stop paying, or supporting free questionable browser extensions, I just tried saving data and I got some great results. I dropped some of the options because I honestly don't use it, it was pure curiosity.
BTW, when it comes to music, I download it, it's one download and allows me to listen unlimited times. When it comes to video: same, because most things I save it for reference (documentaries, how to tutorials, etc). When it comes to other stuff... it's funny, most videos are garbage and you can skip and skip, only watching like 20% of the video to get what you really, really need.
Good luck.