The Moon, how small can it get?

It is apparent that the moon is shrinking. Not that we could really tell the difference unless someone among us is a moon nerd. This article says that the moon recently only got cool enough to begin these contractions. Earth may have already contracted and the lobate scarps formed. Mercury and Mars may have lobate scarp sightings. The moon may still keep shrinking or stop at some point, as of late we don't know.
Lobate scarps are like landslides. The lobate scarps are formed when the core of the moon shrinks and the gravitational pull adjusts the Moon's crust forming the lobate scarps. The cooler the interior is however, the less contractions there will be.
Why should we care if the moon will get smaller? We do have electricity to power the light we have in our houses what is the point of the moon then at that point? There are still regions on the planet that don't have the ability to illuminate surroundings other than using a fire. There is a scale for this, during evening hours we turn on our lights to illuminate our way. The scale is based on darkness seen from satellites. The scale itself is from 1 to 9. 1 being the darkest and 9 the brightest. Places like New York City scores a 9. Most of Northern Africa and a Small portion of South America, I believe it was Peru, score a 1 on the darkness scale. For people living in the darkest areas, the moon is natural light and gives nomad visibility of stars to find their way.
The moon is also used to move water. If the Moon is too small to move currents, then for organisms such as crabs and clams, their shelter and food source could remain, high tide, or removed, low tide. For humans, clams would become more expensive if they can't feed. And yet another species we would have to farm. If there is an efficient way to farm clams. Crabs would be forced to go into deeper waters facing more predators other than the birds that eat it. As far as it goes however, there have been no reports of unusual changes in tide so it's all good, for now anyways.

Link: http://news.nationalgeographic.com/news/2010/08/100819-science-space-moon-shrinking-scarps-cooling-lunar-orbiter/