It is. In the past I wanted to test multisig on a cold card, and have been told by the support to just try on mainnet with small amounts... It totally defeats the purpose of testnet. To me it looks like people may be using testnet but individually, or in a team maybe, but not in the benefit of everyone. And with testnet 3, using faucets doesn't even give decent amounts when considering the fees... In my case my testnet coins are stuck on Phoenix, can't even move it because of the fees... Let us hope testnet 4 will quickly be supported.