Ground-Station-as-a-Service (GSaaS) is something that AWS stepped into given the fact that AWS is used quite extensively for the data processing chain, so it was a logical play for them to verticalize. AWS partnered with Lockheed to build out the hardware network [1][2].
They've got some decent competition in the market. We published a round-up article of ground station providers a while back [3].
The move to higher frequencies is changing the market substantially. This year, a number of optical ground stations were supposed to be deployed, given growth of satellite terminals [4]. We'll have to see with the virus what actually ends up happening.
[1] https://spacenews.com/amazon-lockheed-venture-casts-shadow-o...
[2] https://www.lockheedmartin.com/en-us/products/verge.html
[3] https://blog.satsearch.co/2019-09-25-ground-station-service-...
[4] https://blog.satsearch.co/2020-01-22-optical-communications-...
Edit: Added/updated references