I would probably guess that Complexions also has a jetted tub. That's pretty typical results with jets. One time I started the jets far too soon, and ended up with a bathtub full of bubbles and very little water.
My scoops run about 50-60 cents to make and I sell for $2 (that's 1oz size scoops, about right for a single bath). I could probably go up to $3 each for a better profit margin, but I discovered people will impulse buy scoops to make an even bill - eg. they buy 1 bar of soap for $6 and 2 scoops for an even $10 bill, or buy 3 soaps for $18 and a bubble scoop for an even $20. Bubble scoops aren't as popular here (we're 4 hours away from the nearest Lush), but bath bombs are huge for some crazy reason, so making a $2 purchase to check it out is pretty reasonable. Then they're sucked in because these things are awesome and they want more. bwahwahwa. [that's my evil conquer the world with bubble scoops laugh]