It isn't like they couldn't survive without her contribution to their family income.
YouTube's contribution to world peace is not simply to add empathy to current events, although that would be enough.
Actually, she wasn't that interested in making a business out of it, but she felt the need to make some monetary contribution to their marriage.
But by laying bare in 1884 the upper stratum of remains on the rock of Tiryns (q.v.), Schliemann made a contribution to our knowledge of prehistoric domestic life which was amplified two years later by Chr.
The tithe had been replaced by an export tax on exported agricultural produce levied at the custom-houses, and the smaller peasant proprietors and shepherds of the mountainous districts were practically exempt from any contribution to the state.