If McDonald's required 12 year-olds to use an ordering app because their banknotes might be stolen, would that be a reasonable compromise? Foreclosing the possi

If McDonald's required 12 year-olds to use an ordering app because their banknotes might be stolen, would that be a reasonable compromise? Foreclosing the possibility of children not being tracked (which is illegal, btw) in exchange for some marginal benefit for big tech?