Thanks

When one driver misses the other, the other, thanks him, blinking emergency gang. It's nice even to those who do not care.

When one user visits a useful site or just a resource he likes, then why not thank the author, especially if it is clear that the resource was created by a single person and was not originally designed for earnings?

You can thank if the site has contextual advertising. It is enough to follow the link and the author of the site will drop an extra penny. Wash it does not cost anything :) but nice.
')
If it were a rule like motorists ...