You've got approximately 0.5 seconds to get someone's attention with a classified ad.
That's not much time.
Now, while your high school English teacher may disagree, in this case, fragmentation is a good thing.
Whether it's genetic or learned behavior, fact is, we don't READ ads, we skim them. So why bother with full sentences? Full sentences take up more room, don't leave any space, and place too many non-essential words.
Example: Bad AD
Use $Money Gate$ to get into Dynamics 4 Success. Then, as you build a downline for $Money Gate$ you earn $99 fee necessary to join Dynamics for Success which gives you access to $25000 reward program. Get benefactored into 100 Free memberships as part of joining $Money Gate$ Visit http://signup.gotoo.com and enter Tom Staley as your referring person.
The ad immediately looks BIG. Now, who wants to wade through all of that? Plus, with no space at all in text, it makes it difficult to pick out individual items about whatever ad is talking about. Then, if you do happen to read a word or two here and there, if those words are 'as you build' or 'as part of', what does that tell you?