Any advantage from leveling up??

I am unable to see any advantages of it

Once you level up more and more, you receive Soul Gems. That's the best advantage it can have.

Well the only one that I could think of would be when you get to lvl 3 you can do the guessing game

Extra gems when you get too level 4

the bigger the level the more you get soul gems + you can send soul gems from level 6 in packs of 500 to any one on the website (Users) if you decided to do any trading (Gamehag wont be responsible) or donate a friend even

you get some soulgems every time you level up.

Sounds like a good idea