Blockchain Explorer Tether https://www.instapaper.com/p/16800704 So, if there is a large number of transactions within the mempool and you compensated a relatively minimal transaction charge, your transaction can stay unconfirmed for an extended length of time due to the fact miners/validators will pick transactions with higher service fees 1st. TraceHawk is https://www.demilked.com/author/crawford18sheehan/