Answers:
1 because some people don't want to spend a week's salary (or 2 weeks worth of cigs) only to find it doesn't work for them, some can only afford to buy their cigs from day to day.... A cig alike is a good thing to try to see if they like the concept.
2 many of the mods, to me, look like bedroom toys, and I for one am not about to suffer the sort of comments that would be thrown at a woman sucking on one of those in public....
3 there are actually people (eg. me) who don't need anything more than a basic set up to drop the cigs.
I have been a member since 2009 and have lapsed after my experiences with the early cig alikes. However, the quality is now so much better. I am using 2 tank/atomiser systems, the ecab at home or driving and the eroll for social situations, and I can honestly say that the quality of these for me, is so superior that I don't feel I have any need to progress any further, not even to vv etc.
They are simple systems, no leaks like the early tank systems I tried, enough TH for me, easy to refill and parts easily replaceable.
I have gone from more than a pack a day to 2 or 3 cigs a week, 3 puffs at a time, and I don't think it will be long before I drop those.
I'm not saying I will never progress to anything more advanced, but so far they have done what I wanted and that is to stop/slow down my enslavement to the burning tobacco. As such that is all I need, and I am saving a lot of money when cigs here are £9 a pack!
So, basically, you don't have to 'keep up with the Joneses', it's all about what works for the individual.
For any newbies, don't be persuaded that you must have the latest, greatest, try the starter kits that Baditude and others suggest, and progress if you need/want to, but if it's not a hobby you're after, and just a means to quit the analogues, then it may be you don't need anything more than a basic kit.
Just MHO, good luck everyone, whichever route you choose...