Just thinking of what else we might be able to do with the same principle.
These rituals cut the god out of the miracle granting process using the trappings of the Cult Mechanicus to do miraculous things with machines.
I wonder if it might be possible to effectively pray to yourself to cause miracles relating to yourself. Perhaps something similar to historic forms of Taoism where it was believed that each person contained a microcosmic pantheon of deities responsible for different aspects of the self which could be prayed to or meditated on
The Mechanicus rituals substitute cybernetic replacement of the body for Weight, so presumably such rituals would need something similar related to spiritual self-improvement or self-actualisation. If we can teach the methods from Exalted by which mortals can Enlighten and then strengthen their Essence, I could see that being an appropriate substitute. Possibly in a feedback loop, using such rituals to gradually strengthen your essence after Enlightening it.
Connected to this, given that it's exalted, are things like martial arts, kata that are also ritual prayers to the self designed to improve the benefits of exercise. Of course; other similar ritual practices can be imagined, ritualised mental exercises that divert the prayer generated to improve the speed of learning or how good you are at the task you're performing.
Basically, if people can generate prayer energy, why not try to use it for their own direct benefit.