I found it stupid. I played it a few times and of course won nothing. I don't know what the company's financials are, but I think giving people $5 and $10 credits or free shipping is a good way to get people in the door. Most people will likely spend much more than that at ECS anyway.
Past: 1999 Techno Violet Metallic M3
Present: 2011 135i 6MT