I don't see any meaningful benefit to not using the tadpole. I brought up this very question a couple of months ago. Seems like playing evil gets you a lot of nice benefits, whereas playing good is only about you getting to pat yourself on the back for having been good but you get nothing else. Or at least this is my hypothesis. We'll have to wait and see.
The benefits of being a "bad' person are often much more tangible than being a "good" person. The benefits of being good are often reputation, self-satisfaction, and a slightly better world.
