do you get smth in return for holing the tokens 
I failed to see which part of this post that is not clear enough for you. They have clearly describe what will you get for holding certain amount of token. Or you missed this post?
SOMA AIRDROP!
As we promised, we are arranging an airdrop which will benefit token holders that hold SCT until the launch of our MVP product in Q2/2018.
The airdrop structure has now been decided and here it is:
- Token owners, that hold 100-5000 SCT - 10%
- Token holders that hold 5000-20000 SCT 15%
- and finally, above 20000 SCT 20%.
The unconditional rule for the airdrop is that tokens have not been transferred from the address they were allocated before the launch of the MVP.