It solved an immediate problem for them
It got "them" to Citrea. This is was Jameson Lopp attacked v3 too.
Surely this is apparent to you at this point as well?
To be clear, no one cares whatever flavor of shitcoining you're interested in. If you want to eat peercoins topped with clam sauce or whatever, that's your own business. But bitcoin devs aren't interested in shitcoining, and aren't interested in maintaining software for shitcoins themselves, and just won't continue to use any testnet thing that has economic trade that makes testing cost money that ought to be free.
Just to be clear as well, no one cares what you think a coin is made for. None of this is should be exclusive to what you think you think because the facts are showing a very different story.
Also, Testnet is and always have been free in small quantities. We support this. People having the options to spend a few shitcoins to get a few Testnet coins is none of your fucking business.