I've owned a Slingbox since the mid-2000s and been very happy with the service. For those unfamiliar, you hook it up to your set top box and it rebroadcasts your signal over the internet and provides things like a remote control library so you can manage your device 100% remotely.
When I first got it, it came with Desktop software for Windows and Mac. This was replaced with a plugin based web interface a few years ago. For iOS and Android devices you have to buy a (rather expensive) dedicated app. I thought this was good value for money so invested. It's especially useful as I travel abroad a lot and UK-based services are almost all geofenced.
In the past 6 months they have been putting advertisements in the web app. Because Chrome has deprecated NPAPI, they released a Desktop application again (the old one doesn't work properly on recent versions of OS X). This Desktop app now inserts mandatory advertisements.
As a long-time customer it's infuriating! I paid good money for my Slingbox which originally had a Desktop app with no ads. The sale promise was "Watch TV anywhere with no subscription". I consider advertisements a subscription.