Hi Stephen,
I ended up just using the PMS5003 by itself through this - https://shop.pimoroni.com/products/particulate-matter-sensor-breakout and using an ESP8266 with some arduino code to use the Thingspeak API instead of AdafruitIO.
My PMS5003 feed is currently on my site at https://wildestpixel.co.uk/live-pms5003-feed as a result.
I’ve got a BME280 on feather I’m going to airlift to AdafruitIO or Thingspeak in the next few days.
I was equally frustrated too as in consideration of the design, knowing its not going to be of use for IOT data with the defacto airlift, some workaround should have been looked at early on.
I’m also not sure how one is supposed to use for Luftdaten as advertised without jumping through many many hoops.