@timezer0 the ones I mentioned could be expected requests. There also could be request for some favicons or other resources related to Speed Dial tiles on opera:startpage. Also for clean profile we display https://www.opera.com/client/welcome page which does make requests to Google, Facebook and Yandex for statistics.
Could you try to use for example https://www.telerik.com/fiddler (not sure if it will catch all request though) or some other tool so we could actually see what requests those are exactly?