If I can interject, I prefer just leaving this trope as it is, particularly it's name. It's name may be a meme but that's actually a good thing, it increases the trope page's exposure, and really, it's more fun that way.
If my interpretation of it is correct, this trope can be either comedic or dramatic, it doesn't matter which, just that the plan of whoever has 3 things:
1. A goal.
2. A plan to achieve it.
3. On it's own the stated plan would not accomplish the goal.
That's it, it's no more complicated than that. If say, a villain states that his goal is world domination and says that to accomplish this he will kill the hero, without explaination as to WHY killing the hero would suddenly have the entire world at the villain's fingertips, then that's Step Three: Profit
. In actuality the villain might HAVE a second step, but if it is never explained what this step is, then it's still Step Three: Profit