How to PayBack to the site owner/webmaster if you have used the services for free and like the Free services?
If a site is providing Free Services online and you have used them and have liked something from those services then how you can payback them. There are several ways in which a user can payback not the exact amount but something depending on the way.
One way can be giving the donation to the site and the service provider. There can be a donation or help link provided on the site from where a user can give donation. If the link is not provided then also by contatcting the site admininstrator the donation can be given.
Another way can be by placing the link of the site on your website (if you own a site), by promoting the link/site by various methods like by using email (avoiding spam), posting links on another sites and giving reviews etc.
Thirdly, if you have found the right service you were searching then there will be links on the site with similar services. You can check those links also to have more information about the things you were searching for.