I was working with a group of individuals as a consultant on helping them move their mined bitcoin from one wallet to another (as the request was explained to me).

I assisted them with setting up a multisig wallet for their group of guys who all put money into investing in BTC, and then asked them where the bitcoin was at (wallet location) so I could complete the transfer. They said they did not know and that they were working with three different individual minors who told them that they could see the bitcoin had been mined since 2017 but needed to be moved. They also said the Bitcoin was mined flat, which to me is referring to the market, not the bitcoin itself. One bitcoin is one bitcoin, there is no such thing as a bitcoin that was processed flat, without "fees.?" I told them this doesn't make any sense and I guess I am just looking for some confirmation on this, because the miners keep telling them this.

These so-called miners are not able to provide proof of the so-called bitcoin balance that they see at all but keep asking for money to move it. These miners have been asking the group of guys for "fees" of 100k... 150k... and more to complete this move of BTC. This doesn't make sense to me because if the BTC has already been mined since 2017, it would go into a mining wallet as it's being mined from respective mining pool and should be a simple wallet transfer, correct?

I was able to chat with the miners via google hang out chat and they were saying they needed money for RBF fees, but, again, this would mean that the BTC is already in a wallet and they will not send proof of the BTC balance in the wallet. The biggest red flag I see that I have been trying to come up with a clear answer for these group of guys is that they keep saying that these miners "See the same amount of BTC in the mining pool ready to be sent to their wallet." My other issue, is that people can't just find a wallet out of the blue and access the funds, that isn't how it works. They would need the private key and seed and nobody can tell me if they have this or how "all of the miners have access" to see this stuff and have the power to move the BTC. I am obviously not a miner, but for security purposes this all sounds like BS to me. They also won't tell the group of guys the mining software they use which is understandable lol.

This sounds like these people were scamming them and I am just trying to determine if that is the case. If this is the case, these guys have been scammed since 2017 and thinking they have bitcoin in a wallet somewhere waiting to just be transferred to their wallets.