Add-on Developer Question Regarding Sling TV

Hi developers!

I’m doing some research on Kodi addons related to Sling TV and other paid TV services that stream video content online. My question is somewhat multi-faceted, but I’m hoping some knowledgeable devs might be able to assist.

I noticed that services legit IPTV services like Sling TV have no addons, but I can’t for the life of me understand why. I know other subscription-based services, like Crunchyroll for example, have addons that work in Kodi, but, knowing little about how Python scripts work, I can’t figure out why a service like Sling does not have one yet. I saw some forums on here from back when Sling was announced with a few people suggesting that addons would soon follow. That was in 2015. Still nada.

So my question is: is there an issue with licensing? API? Something with getting a Python script to work with these services?

The upcoming YouTube TV service re-piqued my interest. I know that YouTube already integrates well into Kodi, but the new YouTube TV service is likely to share more in common with Sling than YouTube, so I’m fairly certain fetching streams won’t work the same. YouTube has also failed to update its Terms to suite, so I’m not sure how that will look for something like an addon.

The second area is — if I wanted to try to dig my hands into developing an addon for this, where would I even start (assuming its possible).

Any help would be great. Thanks!