what is the point of testnet coins here? testnet is moslty to test the new dev of the main network just like bitcoin main network with zero economic value.
What are you talking about?? The Bitcoin Testnet is literally used by developers to test what it would be like using the real Bitcoin main net, but without the consequences you would have from losing real Bitcoin..
From
https://en.bitcoin.it/wiki/Testnet:
"The testnet is an alternative Bitcoin block chain to be used for testing. Testnet coins are separate and distinct from actual bitcoins, and are never supposed to have any value.
This allows application developers or bitcoin testers to experiment, without having to use real bitcoins or worrying about breaking the main bitcoin chain."
OP is using the Bitcoin testnet for exactly what it was intended for.