Well u say warez is suppose for free - don't sell for money.
Coming to a multi poster is the complete code of a respected coder. So he will obviously charge to use his app because it is his creation and not a pirated one. So remove it from you post.
dcrew's multiposter is free and you can simply download and access it if u need a free one. Then coming to jayfella's MP5 and themaposter are $20 and $25 respectively.
batori of warezme.org also made one auto poster and it is the cheapest one till now and I guess the prices are around 3$ a month. I donno exact rate check their website.
By using a multi poster u will definitely earn. So pay for the app and then earn whats wrong?