What about the dividends, is there detailed info about it?
Not really, it depends on how Modum will perform after official start in Q1/2018, this is from the whitepaper:
"The board of modum.io decides and declares the amount of dividends when there is a profit. A payment equivalent to this amount is converted to Ether and sent to the modum smart contract.
The modum smart contract evaluates the current holdings and distributes the profits to the token holders in Ether."
Would be funny if it were to be given back as some sort of cashback through dividends.