Ah, yes, you’re right about those two churches, since they recognize the popular veneration of a saint, by the practice of glorification. I would explain this notion of “glorification” as an institutional matter of co-opting the instincts towards superstition and folk religion.
In the case of Eastern Orthodoxy, there’s also the therapeutic aspect of theoria, which are means of illuminating and healing the fallen mind. So seeing “miracles” everywhere could be to the believer’s spiritual advantage. It’s like psyching yourself up for the miracle of the afterlife. Deep down, the believer knows they’re not real violations of natural law, but just mental projections and fallacious thinking, but she’s only treating the wonders instrumentally, just as the Church leaders are being pragmatic in assimilating folk traditions to maintain their authority.
In short, I suspect there’s some insincerity behind the veneration of those mass miracles.