Satellite video companies like AT&T's Direct TV and Dish Network are having a tougher time navigating the cord-cutting crisis than some of their cable rivals.

Why it matters: Telecom companies once saw satellite TV services as a good way to expand their customer bases, leading to acquisitions like AT&T's DirecTV buy in 2015. But as viewers ditch their expensive pay-TV packages at a faster rate, those investments are becoming harder to quickly spin forward in a profitable way.

"Cord cutting is clearly affecting the satellite companies the most ... That segment of the market is in real duress."

— Craig Moffett, Founding Partner at MoffettNathanson, to Axios' Kim Hart on C-Span.

By the numbers: Satellite TV services (mainly DirectTV and Dish) had more net subscriber losses in 2017 than in any previous year, according to Leichtman Research Group, Inc.

Satellite companies lost 1,550,000 subscribers in 2017 , compared to 40,000 in 2016.

, compared to 40,000 in 2016. The top six cable companies lost about 660,000 video subscribers in 2017 — compared to a loss of about 275,000 subscribers in 2016. (Those six are Comcast, Charter, Altice, Mediacom, and Cable ONE).

What's happening: The main reason satellite companies are in a bind is because they lack widespread broadband services to recoup the cost of people ditching pay-TV packages.

"The cable operators are weathering the storm relatively better in the sense that, as customers, cutting the cord is really not an appropriate moniker at the end of the day. They are disconnecting their video relationship, but they're keeping their broadband relationship, and in some ways deepening the broadband relationship ... And the cable operators are actually gaining subscriptions," says Moffett.

And even though satellite operators have successfully converted more pay-TV subscribers to digital streaming TV subscribers, they are struggling to make the same kind of profits with cheaper digital bundles as cable companies can with lucrative broadband packages.

While Dish-owned Sling TV and AT&T-owned DirectTV Now added 1,599,000 skinny bundle subscribers last year, the top cable companies — namely Comcast and Charter — collectively added 2.7 million broadband subscribers in 2017 — 83% of the net additions for the top cable companies in 2016.

Expand chart Data: Interactive Advertising Bureau; Chart: Lazaro Gamio/Axios

The bigger picture: Beyond pay-TV, many satellite companies provide broadband services, particularly in remote areas where fiber-based broadband is too expensive to install.

Yes, but: Compared to fixed and terrestrial wireless broadband, satellite services have high "latency" — meaning it takes the connection a while to make the round trip between a geostational satellite and a ground station to relay the signal to consumers — resulting in a connection lag.

Compared to fixed and terrestrial wireless broadband, satellite services have high "latency" — meaning it takes the connection a while to make the round trip between a geostational satellite and a ground station to relay the signal to consumers — resulting in a connection lag. While delays are often only a matter of milliseconds, that can feel more like several seconds or even minutes —i.e., an eternity — for today’s consumers with instant-connection expectations.

That lag is highly disruptive for streaming video that relies on a continuous, robust connection.

Weaker internet businesses also affect satellite companies' abilities to tap into other markets.

Internet of things: Slower and weaker internet connections limit the use of highly interactive, real-time applications. With the average household now owning roughly 13 internet-connected devices, slower internet isn't just a media problem, but a lifestyle problem for consumers and productivity problem for businesses.

Slower and weaker internet connections limit the use of highly interactive, real-time applications. With the average household now owning roughly 13 internet-connected devices, slower internet isn't just a media problem, but a lifestyle problem for consumers and productivity problem for businesses. Content delivery: Traditional, earth-bound fiber networks still have the clear advantage when it comes to reliable delivery of rich content. This is particularly true in densely populated urban areas —where the bulk of viewers that media companies want to reach are located.

What's next? Some satellite companies are looking to add-on services, like more DVR capabilities and additional local services, to help increase the margins of their skinny bundle services.