Many are trying to promote their site − however their methods are so ineffective it is no wonder they complain that promotion via forums does not work for them.
But in truth you can get dozens if not hundreds of replies from a single posting − if you do it right.
Let's take a look at the various ways that people make postings, starting from the most unacceptable and ending with an entry which even the strictest forum moderator will enthusiastically approve.
Example 1:
Your post says
I've just found a really cheap web hostingThis is a blatant ad (spam) and will be removed.
company,
Fred
www.a101hosting.com/~2378