I suggest that simply post what is your favor or what is the "free" service that you are talking about.
When people are reading here this type of words, something is created in their minds for something shady.
Though I'm not saying that you are doing it. And with that total number of people, do you expect that 100,000 forum members will do it for you?
If that is easy, give people reward. Many aren't going to waste their time for this kind of "help" for an hour without pay, just saying mate.
I want each person to focus at least 1 hour in 2 bitcoin faucets and pay me the minimum withdrawal 20000 satoshis.
Everyone collected amount will be 1 BTC + to me and I will pay people for the hardwork.
$1/hour
See, in real talk no one is going to talk that offer at first you had mentioned for the ones that has a "good heart".
But still that's not worth it though, why not try to change your original post now and make your offer clear so that it can be visible.
Put some clear explanation on what is an interested guy needs to do. I just don't understand this thing that you had mentioned.
What has that 1 btc + means, your rate is like with captcha's also just like bitmaxz said, you need escrow for it.