Yes the surfactant helps it cross membranes. But what I meant is that when people tested the two parts separately the reasonably safe surfactant seemed more toxic than glyphosate, which provided me peace of mind that glyphosate can't be too toxic if soap is worse. But if a lot of the data is faked or manipulated that assumption isn't valid.
Oh, the only data I've seen are the published papers. I have no inside info.
#2 won't load for me
For #1 and 3 I would say that the concentrations used are very high. I would not expect anyone except workers spraying Roundup maybe to ever encounter something like millimolar levels of it. We usually deal with things at the nanomolar or micromolar scale of concentrations in science.
