I saw similarity in some cases reported here and on trustpilot: The client is moving tokens that really have a market and are high (maximum ATH), they block the client for a while and after the token drops 50% they return the account or release the transfer of the client token. It may just be imagination, but analyzing the occurrences it makes sense, in my case the Token that I traded doing arbitrage between Mercatox and 1inch was costing on average 0.05 Eth each (very high ATH), the buy orders were between 0.037 and 0.043 and after being blocked they were settled exactly up to 0.037 Eth, the tokens reached 0.055 Eth both on Mercatox and 1inch and today they are 0.025 Eth (50% correction), if my thesis is correct they will wait to reach 0.02 Eth and they will return me the account with the settled (bought) tokens.