If the person gives you only one seed phrase and you noticed that you can not withdraw it, it means the wallet require the second seed phrase which can be used to access the wallet and spend the money. But some people use this tactic to scam people in the past and and it become common and known to be scam.
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Bro, why are you saying obvious things that are already clear?
I said this money can't be withdrawn!!! It has a double multi-signature, so it's clear to everyone that you can't withdraw the second seed phrase! And I don't know the owner of the wallet!!
This wallet is just for viewing the balance or showing off to friends! Do you really think that someone would sell it for 150 USDT if it was possible to withdraw something from there?

PS. The biggest scam is your site that took 20 ethereums from me for good, do you know how to return it?