Control Dashboard for Particle

Has anyone tried to work with Cayenne at https://mydevices.com/ ? Their dashboard looks easy to design with drag&drop.
There is little mention in the Particle community, but seems like people made it work in this old post
I found an old Hackster project that demonstrates how to flash an LED.
I also read in a post here that someone used the MQTT service to work with a Photon.
The unofficial library for Particle is here. I started to look into how it works. I don’t understand why it is mixed in with Blynk.
I am also wondering how much burden does is put on the Photon, on top of my own code.
However, I just read that library has been deprecated here and I need to use MQTT.

It would be ideal if Cayenne supported Particle hardware directly, but it doesn’t seem too difficult to implement as is. Or maybe the key words are “old post” and none of this works anymore?