Promote a b2b software product

Hello, We are looking for a person that is able to help us promote an existing b2b software product. We have not invested any time, effort or money in this project in the last 4 years and now the sales are almost zero. While we were active in promoting this product the monthly sales were about $10k. We have recently rebuild the website and we are looking for someone who is able to promote it. We are looking for someone with experience in shareware sites and other free/convenient ways to promote a product. We are willing to spend a limited budget on advertising if is required / suggested. You can suggest changes / improvements / landing pages for the site and / or anything that will increase the traffic and conversion rate. You will have a dedicated email address that will be used for this project. We see this collaboration in 2 stages. The first 8 weeks (2 months) we are willing to pay a weekly amount for the work done – based on activity reports and the evaluation of the traffic / download requests / product installations and sales / price requests. This collaboration can end at any time if we do not see positive results. After the first 8 weeks we (both us and you) should decide if the collaboration will continue and decide if we continue with the weekly payments of move ahead with a % from the weekly/monthly sales. I am looking forward for your bids. You can bid any amount and if you are selected we can agree on the final value. I will provide more details about the product to the most convincing bids. All the payments will be done here on freelancer. We are a serious buyer and we are looking for a long term collaboration on this project. Thank you!