Does voting power below 100% affect something and isnt good for account?

It just affects your upvote value. The less voting power you have - the less is your upvote value in $ next to the post what you have upvoted. Nothing more and nothing less.

BUT: In my opinion the upvote value is not as important as the vote itself or comments. Interaction with the creator is the most important - not the ammount of money we "send" him. Of course it is good to give 0.1$ instead of 0.01$ but yeah for me as creator the upvote itself counts much more.