Написал в суппорт линоды. Те уверяют, что ничего не обосралось:
> The reason for this discrepancy is due to the time in which you converted over to hourly billing.
> Being that we bill on a 28 day cycle, by converting on the 22nd, you were credited for the rest of the unused time. Then from there, you were billed for only the days that the Linodes were active while on hourly billing.
Честно говоря — с трудом верится, ну да хуй с ними.
Короче, в двадцатых числах можно апдейтиться на хоурли биллинг и вам все спишут на хуй.