For some reason it doesn’t mention Austria or I may be missing it – If you want check as I uploaded the article – Its the first one on this page Law & Legislation | iGaming Business I would think Austria is ok as I am sure you can do Google PPC in Austria or at least operators can
Under Slovenia it said:
There are no express provisions under Slovenian law which apply to online betting and
gaming. However, offline gambling can only be organized by a company located within the country which has been granted a licence. It would appear, therefore, that online gambling could in theory be licensed but, unless it is, it is prohibited.
It is an offence to provide online gambling licensed outside Slovenia into Slovenia, although
given the lack of enforcement action to date, the risk to operators with no local presence is low.