Do they get the gems for each level passed?

I passed level 3 and I get 15sg

You do get a few SG but more importantly, certain features are now enabled. At level 3, you are now able to order rewards. Do not pass up on the Mannaz Rune for instance, if you are a user who logs in daily. It costs 10 SG and increases the number of SG you get every day. You can find it here. https://gamehag.com/shop/mannaz-rune

the amount of gems for leveling up increases as you get higher level and more features will be unlock like voting, etc, it is little or much is up to you

this is very nice theme

You'll earn a couple of SGs everytime you level up.

what is annoying is that levelling up can take a lot of time...

I earn 15 SG for level up. And I use the rune I got 7SG for daily login. I also play guessing game and get some SG from it. From guessing game I got 100SG for the first time I bet in the game.

leveling up takes a lot of time ,i've been stuck on level 2(still am) for months

very cool guessing game