Think of the surface of your logs like your skin and your stain like your sunscreen. Now if you look at the pigments in your stain as the SPF of your sunscreen we get a better idea of the type of protection you are going to get out of your stain. Now we know that the more SPF in our sun screen the more protection from the suns UV rays we have and the less we need to reapply.
Now most of us love the NATURAL look, however those stains have very low pigments giving us an SPF rating of let's say 10-15. This means we don't get as much protection from the sun and to keep that natural look we have to do much more maintenance. Where as if we choose something with more pigment like a Bronze Pine or a Chestnut we get a higher SPF rating of let's say 45-60 and now we get much more protection and life out of our stain.