I'm sorry, but I have to admit, I find this comps very disorganized, and might end in a flop.
First of all, 80 people??? You should think about it. This is a forum, not real life. The limit is too much, and if you had 80 people compete, and you wake up with many notifications to organize results, that's a very difficult feat indeed. And you need LOTS of free time.
Next, you're making too many comps! If you have to track results for several comps at a time, what's the gain? All it does is it makes it harder for you, and even wastes time. So please just start one at a time.
There are also too many competitions being hosted right now in the forums. Like most of the threads is just forum competitions. Maybe wait some time, and then host one?
Sorry if this sounds rude, but I actually mean it, the state in forum comps right now is kinda a bit messy, and wouldn't be a good thing to make it worse. And I kind of have experience from hosting a competition, I thought 30 would be a great amount, but I didn't include the time and work it takes to host a competition.