Yes. I've also been coming across these ads, at least 3 or 4 times this past week. It was useful when it told me that I had crossed 80% of my data limit - I can consider it an info and not an ad. But except for that one time, it was always an ad for some broadband plan or unlimited free calls.
I'm also on Win 10 x86, using chrome browser and a BSNL plan. I came across these ads while browsing quora, xda and some others too.