No, I don’t think Frodo ever does tell him to jump.
More relevant is that Gollum swore an oath by the Ring not to harm Frodo, and Frodo warns him thay the Ring will hold him to his word cruelly. Then when Gollum does betray Frodo, Bam! Straight in the lava.
Well the ADA only requires ‘reasonable’ accommodations. So I guess the logic of this case would be that if the substitution only costs a little bit more than the original ingredient then they should offer it at the same price. But this would still allow for business to charge extra when making the substitution would be ‘unreasonably’ expensive.