Facebook's Diem project is maybe dead but two people that worked on it managed to raise $150M and start working on Aptos, yet another Layer 1 blockchain that is advertised as "the fastest and most scalable". Without getting into that let's just get right to the money part because no one cares about centralized chains anyway.
How?
For this one you will need the Martian Aptos Wallet. It is very similar to Metamask so the setup process is very straightforward. I do want to emphasize that this is not a 100% guaranteed airdrop but I do think that testers will have a high chance of getting some free coins one way or another.
So far there are only about 300 validators that participated in the Incentivized testnet program and they are set to receive some tokens at launch. I believe that this number is very small and according to the roadmap both "technical and non-technical" contributors will be rewarded. In my book, it's worth a shot.
Vial is a simple lending protocol and you can deposit your testnet coins in it, take out loans and test the protocol in general. You can get more coins by clicking on the "airdrop" button in your wallet or by using the faucet on the Vial protocol website. You can get as many testnet APTOS coins as you like by clicking on the Airdrop button repeatedly but be sure to not use it too often because a spam timeout may be triggered.
The ENS of Aptos. Register doamin names a few times and be sure to do it at least once every week because testnet names reset every 7 days.
A blatant copy of Opensea where you can trade testnet NFTs and test the platform. Check it out and try to buy/sell some NFTs to increase your potential airdrop chances.
Why?
After dozens of layer 1 chains that don't bring anything new to the table interest in Aptos will be minimal IMO, regardless of the Facebook/Diem connection. They will probably try to get people on board with a few free coins here and there because airdrop news always travels fast in crypto.
They recently made minor changes to the incentivized testnet roadmap and stated that there will be only one more testnet stage before mainnet. This could be a public testing program where users will need to register in order to get rewarded. I will keep a close eye on this and provide updates as soon as they come.
At the end of the day it is a VC-funded chan and I don't mind getting some free money from them.
Aditional Info
I don't know if it is worth it to create multiple wallets for this one. They will probably try to prevent Sybil farming through some form of whitelisting or registration but if you have the time maybe give it a go. It should be completely up to you.
Follow them on Twitter and keep an eye for updates. Again, nothing is guaranteed here but I feel like it's still worth 5 minutes of your time.