No, never heard of it. Or Google…Heard of a contract clause? Google it
Anyway, you have absolutely zero grounds to speculate this is actually the case here. As if Ineos will be just giving these clauses away to 22 year olds while having Pidcock in the team and aiming for a new top tier GC rider… just accept the fact that your opinion of Rodriguez being the leader in TDF in case Roglic comes to Ineos is as good as that of those who claim the contrary. In fact, it’s a bit ridiculous to make a huge buyout of a star GC rider just to find out you have some contract clause where he will only be able to carry bidons to your juniors…