I have given away 4 games but my contribution is 30.00$

Because they were all in bundles.

If you give away bundle games you can max. get 30$ contribution. After that you need to give away games without the " * " in the list, this means they were in no bundle, to get higher contrib. .

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1.

Games which have been in bundles or otherwise made widely available at little or no cost are added to the bundle list. Games in this list will not add more than 20% (1/5) of your non-bundle contributions, disregarding the first $25. For more detailed information, see this thread.

Hi wiss83! Welcome to steamgifts. :)

You need to check this post ASAP.

http://www.steamgifts.com/forum/5vgHq/faq-site-guidelines-comment-formatting-user-add-ons/page/31337

and this one

http://www.steamgifts.com/forum/eod99/a-note-regarding-cv-and-price-drops/page/31337

thank you all for the help :)

RTFM or UTFG