This is misleading. Nest is not doing anything to the device — they are only shutting down support for a product last sold in 2014.
Revolv as a product failed and the team and technology was acquired by Nest.
After two years, Nest decided to stop paying to operate a service which generates no revenue because the product has been off the market for several years.
If you have a device which depends on an Internet service to work (which costs the operator money to provide), don’t expect it to stick around forever.