Let me remind you, Cicciolina been doing extremely well on Spotify, which rarely happens for UMK song. It legit is the biggest hit of UMK ever had. Also, this UMK was the most viewed UMK ever with 885k viewers on average - this is when last year UMK had it's lowest viewing numbers ever.
Also, there are lots of people who hate Erika. Believe me, the hate been absolutely insane and even after UMK those people have celebrated that she didn't make it to the Eurovision. This is due to her relationship and the provocative lyrics. I'm not denying the fact that there were people who just simply liked Aksel, but there very well could've been some antivotes as well.
Then there's the performance which might've turned few people off. While there was nothing to change about Aksel's performance, it was perfect as it is.
Anyway, the numbers seems rather low compared to viewing numbers - Producer of the show were speculating that the Finns are rather lazy at voting their favorites, which also might be true.
Erika might've not won UMK and make it to eurovision, but she will certainly have a great career here.