TradeSatoshi has been sending payment for withrawals of BTC with absolute minimum possible transaction fee. making sure that the transaction goes unconfirmed and better yet they even double spend on those transactions. they have been sending trxid with 0.25 sat/WU - 1 sat/B
just one of the proofs of them is here... you can follow the trail and find they have been doing this for almost a week now!
Outright disrespect for their own customers. In such a busy network, people will not receive their funds or will have to spend extra on transaction acceleration services. As this user did: