I started reading information about RaiBlocks to improve my understanding about the technology. What I did not understand yet, what are the incentives to secure the network and to find the consensus when there are no fees? IOTA follows a similar feelss approach. It solved the problem by making each transaction possible only after confirming two other transactions. How is it with Raiblocks?
Read Whitepaper attacks section. What kind of security are you talking about?
For consensus. In case of forks representative nodes will vote with delegated weight balance (DPOS).