Having seen how things work where freedom is not the default, I much prefer freedom.
There are rarely laws around preventing collection of said data or using said data for some new service.
Sometimes people talk about GDPR being only the cookie banner, but thanks to it, its forbidden to collect that kind of data.
The qualifying criteria is probably just having picked an offer for renewable-sourced energy in the past, indicating that it has some importance to you. So you will be given more green energy offers in future.
Every company segments its customer base this way for marketing. Sometimes it’s even useful.
I'm not sure if this is better or worse than them doing it because they believe in it.