I have two cases working with PR agencies, one for a product that already had many users. We wanted to promote the product in different sectors by attracting media. Second, we wanted to run a crowdfunding campaign so we hired a PR agency to build the community before the campaign and attract media during it.<p>Both cases ended up complete failure regarding the performance of agencies, despite the product and the campaign went very well with our own efforts.<p>To understand why, I'm trying to know about others' experiences working with PR agencies.