I think the EU can & may be doing both. AFIK, at least a few countries & research entities over there are using FOSS, at least in part, as well as promoting it

I think the EU can & may be doing both. AFIK, at least a few countries & research entities over there are using FOSS, at least in part, as well as promoting it. Hypothetically just because a Government is using FOSS to operate does not mean a company can not still break antitrust rules.