So I'm reading your post, nodding along, and then I see your signature... an ad for a dice site I never heard of. Made me laugh out loud. 
LOL.
They don't have an investment option though so they're not really comparable. Dice sites with investment options tend to have bankrolls which can balloon in size if the site proves to be popular so if the site suddenly shuts down without warning (as dice.ninja did) then the damage is usually much worse. Otherwise, most players don't keep large amounts of BTC on dice sites since they tend to withdraw their funds after they have finished playing.
I edited my post, probably after you replied to it, to add:
Edit: I checked out the site. They have a 1% edge, but pay their affiliates 5% of every losing bet?
Seems dubious.
Quote
Every lost bet will bring you at least 5% of it.
Seems dubious.
Since posting that I heard from a friend that they don't actually pay affiliates - he signed up as an affiliate and received nothing. So maybe reconsider whether you want to advertise them or not.
"a friend" told me you got paid to promote for dice.ninja ! ^ nice work :\\