Even native speakers have to get used to this type of writing, so don’t feel you can’t speak English! You may want to share these exercises with your proofreader so he can help you make your texts better, too.
You’ve done pretty well.
Close your eyes, and picture this. Your contest was victorious!
The good thing with using stronger words, is that you can drop the exclamation marks. Exclamation marks sound a little sales-y. Try to avoid them in blog posts.
We know why contests and sweepstakes flop (we have seen many), also why they are wildly successful.
Using the word flop is great. I don’t know the context of this sentence, but it would be good to paint a more vivid scene of “wildly successful”. Are the number of email subscribers skyrocketing? How does it make the reader feel when a contest is successful?
The word “success” is a little generic because it can mean so many different things. That’s why it’s always good to try and describe what success means.
Enchant readers. Woo customers. Win business.