So, if I got this right, to get that airdrop I have to lock my tokens in the wallet for 72 weeks ( too long period as for me). Is this correct?
If you want you can lock your tokens for a 72 weeks. You can unlock and withdraw them anytime you want. Also if you're take a part in the airdrop.
Each week you should login to the dashboard and re-assign air dropped tokens to the next airdrop. This will be automated i believe anytime soon.