I somewhere read, too much backlinks in 1 day will hurt my rang on google. Is it true? I ask it because I can make 100 links a day with sending my page to directories.
Even if you made 100 a day - they wouldn't all get authorised that day, some can take weeks to do. So you should be okay with a hundred.
I agree with submitting to 100's of directories a day will not give you an assurance that those submissions are accepted and/or the page with your link will be crawled at the same day.
No. But you should try get links from sites that are not directories as well. The harder it is to get a link the more valuable it is.
But I have to start somewhere. At first I'll submit my site into directories. Maybe not in 200, but in 100 for sure.