I've recently changed my custom Steam profile id from http://steamcommunity.com/id/radowy/ to http://steamcommunity.com/id/rocannon/ - together with my profile name change. After this change I'm unable to synchronize my Steam collection and wishlist. When I changed for a moment my profile id to the old value (http://steamcommunity.com/id/radowy/) the gg.deals sync started to work. So it seems that gg.deals keeps my profile id from the time of my first login and does not accept the profile id change. If it's the case here - maybe it would be nice to have the possibility to change the profile id in gg.deals account settings?
Or maybe use the numerical profile id instead of a custom one?
You can sync your avatar in GG.deals settings - it should also refresh your Steam profile URL.
Thank you, the operation you suggested helped. 🙂