Could be a number of reasons.
Contracts between the parties. Any agreements may have been nullified once LO acquired G1.
LO has an interesting and successful history in addressing, rectifying and preventing credit card fraud in gaming.
The now-removed payment types may not have been up to par with LO - whether for payment issues or just terrible quality to begin with.
LO may simply just not wish to operate with those payment options. There may be hidden costs or terms in the background that we don't know about or understand.
With the new currency conversion ($1-100G1C, I think?) these payment options may not be compatible at this time.
Lastly, patience is a virtue.