I don't think BidVine go so far as to invent fake clients, but I am finding a high percentage of contacts made through BidMatch for Ikea assembly think that my profile's hourly rate is a fixed bid to build anything and everything that Ikea sell, even if it's a 4m wide PAX combo that would take two people all day!
The online chat people have been excellent so far, and refunded charges for these situations.