NHC sold on market with the full expectation they were selling into Landbridge. A hedge fund, "Senrigan" bought them up not necessarily aware they were buying off the king-maker NHC and under the assumption the board of WCL were still crying "reject". Senrigan will now sell into Landbridge's offer.
NHC are not interested in enticing a sweetener for the rest, they are interested in enticing what is best for NHC.
Cheers,