The eRT is an ODA application, so it can be broadcast using existing encoders via the UECP protocol, just like some stations broadcast RT+.
I am ready to give it the highest priority and directly implement these features to all products within a few weeks. However, it seems that the RDS2 technology (incl. logo and eRT) has been rejected by car radio manufacturers. Until their approach changes, it is unlikely that we will continue to implement software features that will not be useful in practice. Of course, we value our users. We try to accommodate them and we are constantly working on improving features that have daily benefits. Integral part of this activity is the ability to put things aside that may well represent a dead end.
By the way, we gave the RDS Spy a simple API interface. A skilled programmer can write an eRT plugin in a few days if there is real interest.
I understand that you probably expected a better answer, but I hope you will at least appreciate my honesty
