Which is why I believe that there is a sizeable Games Played bonus for 18-19 on his ELC to hike up his 1st year salary, with the added benefit to K-Ves that the 10+ NHL Games needed to unlock such bonus would also burn the first year of his ELC.
"You stay, you play, but if you ditch for Russia, boy, we won't call up the rest of the season."
If he was planning to have his ELC Slide for 18-19 while he is in Jokerit and then make it to the NHL from 19-20 forwards, he in all likeliness would have wanted (and gotten) the Schedule A Performance Bonus for the 1st season (19-20) too. But he got enough negotiating power to have a different arrangement for 18-19 that sees him play mainly in AHL with KHL-comparable total income unless of course he breaks through to NHL big time. The Performance Bonus is missing from the 1st season because all parties understand that he won't unlock it playing in AHL in 18-19 and so it would be needless dead cap hit weight.
It's obviously possible that he didn't get a Games Played bonus and that he is content with merely the 1st ELC year getting burned in 18-19, though the added money would be easy to slip in there as a GP bonus. There's obviously the slight risk that someone would want to see the bonus money as a CBA circumvention to pay someone more AHL salary than allowed; I wouldn't think the GMs want this to become the new normal euroboy contract. At the same time, NHL don't want their prospects opting for KHL because of money either, so maybe no one would make a problem of it. The whole idea of Games Played bonus kind of is to hike up the AHL salary for a promising prospect.
But any case, 10+ in N, stays full season in NA, mark my words.