The airdrop of zilla seems to be an early christmas bonus for us komodo hodlers. It is just like being given free assets. Come to think of with just around 11 million tokens supply , zilla will be valuable as time goes by and the projects potentially it will maintain.
Will this also be distributed when holding on ledger?
Unfortunately with the ledger it's tricky. You need to make sure that the 500 KMD are consolidated in one address and you will need to export that privatekey later to access your Zilla. We are working on an Electrum wallet that supports ledger but I don't want to assure you that you will be able to access it with your ledger device...at least for a while.