I bought and sold some at Altquick to increase my faucet supply. I still give away Testnet coins for free. Developers do not need a lot.
SatoshiVM Project airdrop chasers want it for profit. What's wrong with charging them for the large amounts of Testnet coins they use?
More tBTC used for financial purpose which makes less place/people have ability or liquidity to continue offer tBTC for free. If more project ask for tBTC, i expect it'll also affect raise difficulty/hashrate on tBTC network.