Sadly I'm too late - offer expired or updated.... they told me the promo code applies to security devices but not starter kits so couldn't purchase. ;(
Thank you Sir, I'll take a butcher's hook.
you can use ifttt with smartthings, apparently (although i've not tried that yet). https://community.smartthings.com/t/geekbes-smart-wifi-mini-plug-somebody-please-come-up-with-a-device-handler-uses-tuya-smartlife-app/99468/16 seems to suggest that there's a way to link at least one of those into smartthings - and that there are people out there trying to make it happen. also, there's this one (using IFTTT): https://community.smartthings.com/t/kmc-smart-plug/97299/3 they appear to be fairly generic hardware, so chances are if you do some digging you'll find something that'll work.
Thank you. I've got two of these plugs https://www.amazon.co.uk/IrisCargo-Assistant-Support-Control-Required/dp/B07F2JGM58 And one of these https://www.amazon.co.uk/Avatar-Controls-Wireless-Electrical-Monitoring/dp/B07FCCYY22 The reason I bought them was because I could get them for around £7 each. They might be too obscure to use SmartThings. I've started to use IFTTT and the Platform version of it. Now I can activate multiple events from one click on my phone's IFTTT widget. So I'm not really reliant on the Harmony remote as I once was.
if you're curious, i had a play with mine over the last couple of days - i've managed to get my harmony remote's buttons to control my tp-link sockets and my yeelight bulbs, so i think it's safe to say that what you're after is definitely possible. best thing to do is to just google the sockets and 'smartthings' to see if it can talk to them. if you can, the harmony remote can definitely pick them up from the smartthings hub so you can control them with your remote.