Well the answer in short is ...
because it is very gratifying. And because I can. Also I just love to engage with others.
Plus...
I know how tough it is to be on the other side where you post decent Comments and no one Upvotes you or recognizes your contribution.
Not to sound high and mighty ...
but what's that saying "Do unto others as you would want them......"
Conclusion...
Anyway, I do enjoy helping out people in this manner ( as I'm blessed with some half decent SP) and it really has been one crucial factor that motivates me to stay here....even though I just make pennies on my blog and vlog posts.
Cheers to Giving,
Robert Andrew :)