So to make a clear statement, if your intention is to pay back the ETH/ANT dispensed by the faucet after making your claim and swapping some ANT for ETH, i think it's ok to use. There are only 200 odd NFT’s if i understand correctly, so it’s not worth creating a separate process.
On a new line, below your challenge code in the faucet thread, add the word NFT and don’t delete your post, or DM me after you claim your drip.
You’ll get a new badge, but your transaction will still show as theft until you pay back (or use by uploading) the amount of the drip. From the same wallet, i can’t tell if you donate from another wallet.
There is also a Patron badge if you donate more than the drip.
You can donate either to the live address you received your drip from or to the Cold wallet listed on the faucet page.