BuyFromEU

Your interactions will generally be stored and used for further training, so using their services gives them an advantage compared to European companies. I would suspect, although I have not read about this in detail, that the plan for eventual monetisation, once they have a monopoly and people are dependent and unable to switch back, will be to generate a profile and use this for targeted advertising/influencing, similar to how social network services operate. IMO it's much better not to use their services, they want the data more than they care about electricity bills.