[cmews]

I got some airly (https://airly.org/en/products/airly-sensor/) air quality sensors in my neighborhood that are using Helium and you can see other solutions that are using https://www.helium.com/ecosystem. Not sure about the actual usage over time from sensors vs new hotspots joining the network and paying the DC fee, but I'm following https://twitter.com/HNT_DC_Burn and this should increase if the Helium network will be adopted more by sensors/IoT companies. Also the 5G hotspots they are providing in the US will probably add some value as well. You can check the helium twitter feed for companies they partner with or are using the helium network.