Byteball is a completely new technology.
Byteball data is stored and ordered using directed acyclic graph (DAG) rather than blockchain.
Because of witness-system it is less decentralized, which is a problem for us bitcoiners, however nobody knows how this tech will evolve and if a bitcoin-like security is needed. When linking your bitcoin address you will get free Byteball, if you own Byteball already you get 10% of the amount you have, which is a great return on your investment. (If the price will not go down)
For more info:
https://byteball.org/
Use the lite wallet, full wallet takes a lot of time to sync.
Check if your address is properly linked and how much yo will receive for this round
https://byteball.fr/BBdistribution.php
Disclaimer: As always, if you want to invest, only invest what you can afford to lose.