Question about how GSA SER finds target sites

Obviously SER find target sites with the keywords that I have provided.

But what about the sites that are not tailored to specific keywords - like article directories and web 2.0s. How does it find these kinds of sites if left on its own?

The reason I am asking is that with around 100 keywords and only article directories enabled I am getting a very low submission rate (0.1 LPM).

Also, on the majority of my submissions (90%+), I'm getting an "awaiting account verification" message. I am using 100 working Yahoo emails. I have no idea how to solve this!

100 keywords aren't enough. You need something like 20-50K keywords. Dowload 1 million keywords from here and use them - wsodownloads . info/1-million-keywords/

OK thanks. But for non-keyword related article sites, it doesn't use the keywords at all, does it? It just uses general footprints and stopwords (according to Sven). But then I don't understand the low LPM and also the "account awaiting verification" message.