As Inspector Renault observed when he "learned" of gambling activities at "Rick' s" in the classic film "Casablanca", I am shocked.
Memo to all posters: From time to time they (being different bishops in all jurisdictions) ALL do things like that - not just the ones you may not like.
In Russia, Ukraine and Belarus, the divorce rate for the general population is over 70%. Hard to find a person who doesnt divorce at least once in life. So the tolerance is quite high. Also, there still aren't enough priests, they say (though I am not really convinced that every parish in Kyiv needs at least 3 priests...)
That means in practice, that almost all monastics and celibate clergy were married before entering monasticism. As for men, who are ordained while being married, there is quite some divorce, too. Many continue as unmarried priests, but if they find another girl, it is definitely possible to get a second marriage after ordination. I am aware of several cases, and they did it just like the Finnish ex-clergyman in question tried to - they got a civil marriage and then applied to their bishop (in Kyiv, Metropolitan Volodymyr from the UOC-MP) for a second church wedding under ikonomia.
So, actually I would consider it quite probable that the Finn heard about such cases in the MP and tried to do the same. Btw, I also heard such things happened in the Church of Romania, too, but I am not aware of the details.