Only Steamgift for Giveaways?

You'll get the $ value of the game (based on US store prices) if it's a game that's never been bundled, or on a discount that's effectively 95% off based on the US store price (so ~85% off in Russia means that it will count as having a big enough discount). If it's been bundled or on such a large discount, you'll get 15% of the $ value, based on the US store price.

you dont get points you get CV (contributor value)

read this to get a few informations about this site:
https://www.steamgifts.com/about/faq

and this about real CV:
https://www.steamgifts.com/discussion/XaCbA/list-of-all-cv-levels-and-their-corresponding-real-cv

here you can see your real CV calculated by a tool site:
http://www.sgtools.info/real-cv