i doubt there would be withdrawals with 25i or any 5-ht2a agonist as well, but if there are, there are. Stimulants do have some sort of withdrawal, the brain is physically changed, and you get fatigued, eat lots and sleep lots. Not much of a physical withdrawal no but i'm sure the same thing could happen from using a PEA psych.
i've abused the shit out of 2c-e and 2c-i and didn't have any issues. I don't see how anyone could trip everyday for a month though, yeah you'll feel something perhaps but after 2-3 days tolerance becomes monstrous and you cannot trip in the real sense of the word, you'll basically have peripheral effects, like taking shitty speed or something. If that's your thing you may as well just go abuse stimulants. Who the fuck knows what may happen if you take 25i in that kind of frequency, could cure cancer, could destroy your brain, cause withdrawals, make you into God... we just don't know at this point. And 25i is not something i would want to be the guinea pig for.