Are group giveaways Count as Countribution?

Yes they are and the reason why you are not seeing them added on your CV is because they are bundled games.

Bundle games will only ever show up to 30CV. After that point to have them count towards your CV you have to also give away none bundled games. When you give away a non bundled game you will get an extra 20% tossed on the top, least till the full amount of the bundled games have been met with that extra 20%.

You need at least (n. of copies given away + 1) people entering your GA to make it count.
Your case is different though. You should refer to the "bundle games" mechanic.
The first 25CV of "bundle" games count as non-bundle (and are worth their 100%). Past that they are worth 20% of your non-bundle CV.
In your case: 25 * 1.2 = 30CV. When you give away more non-bundle games, the "locked" CV will unlock, still following the 20% rule.

yes, they do, but you can´t get beyond 30$ with bundlegames

Yes,so long as they have at least 2 participants. It did not count because of they are bundle giveaways(games that have previously been at least 95% off or free). Contribution value for people who only give bundle giveaways cannot exceed 30$.