But the grand problem here is that all of them just sign up, take a spin at the free roll, and forget about the website altogether. So my question is: How were you guys able to get such engaging referrals that actually take advantage of the Multiply BTC section?
The only way is to refer a gambler not people that are only interested to click on the link / banner because it says 'free bitcoin' or stuff or you can keep on getting refs from all these people that clicked for the free bitcoin stuff. If you can keep on getting decent number of those kind of people every week, The referall commission should be good enough
In the sense which method really brings the greatest benefit, (blogs, tweets or youtube).
Probably blog or website that has some sort of 'free bitcoin/money' as the keyword? that would have attract some people isnt it. I used to use mellowads for that, it used to be quite decent back then if you keep on running it with low cost