Here's the thing...you don't rely on internet sales completely. Soundclick is good...BUT it's good for having it readily available for people to check out what you have without burning a shit load of sample CDs.
The problem is that as far as the internet goes, people want stuff for free. I have over 100 beats on my soundclick site and haven't sold one of them....nor did I expect to (but sometimes you never know). I make most of my money making custom beats for people because they don't want stuff that's readily available to be heard. They want "new and fresh".
Also Soundclick is easily ripped...not hard to rip a beat you heard on soundclick and encode it to an mp3 on your computer...Google that. That's why on mine you're only getting intro, first verse, and hook...and I usually make mine to where it's hard to chop it and make it fit without easily being able to tell you did it.
Some of the folks who are making big time money off beats aren't going the internet route (totally). They're marketing their beats to video games and labels to help get word of mouth (and creds for their work). They're using the internet to attract new customers true...but most of the stuff on their sites are fully available for a small one time fee. That makes it to where they can not make a beat for however long and still make money off of what they made 3-4 years ago because it's cheap.
Since you have soundclick and myspace, you now have to know how to use them effectively.
Start by using that to network with folks in your local area so they can hear what you have (and know you're local to them) before they break bread with you.
When I started out, I did that in Dallas and was basically paying my rent with it. I just took time away from that to learn different skills across the board (which I'm still trying to perfect, but that's cool)
Hit up local talent and kick them a free beat just to check you out (just keep the rights on it in the paperwork). I've done that too. People who bought beats from me usually got the first one free if they were in a label (and I usually did a contract with them).
Fiev.