I just noted a small passage in Proclus Scholia in Timaios (i, p. 469) has οὐ μακράν τῶν Εὐδανέμων τοῦ βωμοῦ· ὅστις δε μεμύηται ταῖν θεαῖν ἐν Ἐλευσῖνι, οἶδε τῶν Εὐδανέμων τον βωμόν ἐπί τοῦ δαπέδου ὄντα.In short the passage mentions the “altar of Eudamenon” or “the altar of Eudamenoi” that was, whether, a separate altar in Eleusis, or, another title for an altar in Athens. In Arrian’s Anabasis Alexandri (III, 16, 8) placed the altar “not far” from Metroon. According the Greek religiosity an altar of a divinity means that receives offerings and sacrifices. I know that there is a prayer in Eumenides (Eu.938) which asks for Favorable Winds (eudanemoi) who are the bringers of health, wealth and prosperity; however, I am not familiar of any source that claims the existence of an altar at the time of Aeschylus. It seems, therefore, that in the Hellenistic times Athenians altered novel figures into state divinities.