I just stumbled over a thread at reddit (the author has the ok from @balloob) and thought that should be shared here as well.
I just copy the text from there:
Happy Thursday, everyone!
I’m Doug from Allterco Robotics, manufacturer of Shelly automation and IoT products - and I asked Paulus before posting!
We’d like to say THANK YOU! to all of the Home Assistant users out there who also have Shelly products. A lot of our R&D and tech support guys use and love Home Assistant, so we’re still > excited about the integration. That wouldn’t have been possible unless so many f you used our products.
To show our gratitude for your support and enthusiasm, we’d like to offer a 10% coupon to anyone planning to make a purchase between now and October 8th - no minimum order or any other strings > attached, just us saying we appreciate you.
The one qualification is that the discount won’t apply to any products that may already have a discount. I’m not connected to our marketing or sales departments, so I don’t always get the news if they’re starting a promotion.
To summarize:
code: HomeAssistant10
discount: -10%
validity: through Oct. 8th 2021
shop: https://shop.shelly.cloud/ (US customers will get IP redirect, coupon is still valid)
disclaimer: not valid for products already on discount
Thank you, once again, for using Shelly with Home Assistant.
As I know from myself, all discount is welcome, and I personally like the Shelly products. 
PS: I’m not affiliated with Shelly in any way, I just stumbled upon this!
