I read here and there, most people think is not worth to pay someone to submit directories, because most of free directory either will expired domain soon or not stand for long. is this true?
The success of the program can depend on how well the directories are chosen by the company doing the submissions.
Ask the companies for a list of where they will submit your site to, if they wont supply the full list you are interested in paying them to submit to then maybe dont use them. It will give you chance to have a quick check yourself, otherswise your paying blind.
Well... as CanadianEh said, it depends on the type of directories you choose. I personally don't prefer it.I used to submit manually
beware, i don't recommend any submission company, if you really need to submit to more web directories, try to pay for your friends to submit manually.
Some submission companies are better than others, but the ones with any clue will generally cost you more. The other question is, is it worth it for your website? This depends on the topic it is in, the type of website it is, and how many hours have gone into its creation.