1. How big do the traps tend to get?
Less than an inch. They're normally somewhere between 1/2 an inch to nearly 3/4 of an inch (on average) on the largest plants.
2. Does it grow upward year round?
Yes, except when it is dormant.
3. When it flowers is it sterile? Possible to get viable seed?
I've read that it is sterile, but this year I plan to verify that.
4.what kind of growth habits does it have? ( vigorous or average grower)?
It's an average grower in terms of vigor. Doesn't seem to divide too much, so that helps it grow larger more quickly. It helps if you feed it because it struggles to catch its own prey.