For what it's worth I don't like the way Bark works. I manage a wedding and function band and we are registered with lots of different agencies, e.g. Poptop, Freak, Entertainment Nation, LMM UK, Morris, Encore. I filled out the application for bark and only after that became aware that the way it works is that as a service provider you have to pay Bark to be allowed to get in touch with anyone who has made an enquiry. You are unable to make any contact prior to this payment as the contact details of the client are withheld, so you inevitably never know all the details you really need to quote properly. We're a successful and regularly hired band, but it is still only 1 in around 15 enquiries that ends up being a booking, even when greater details are provided up front.
Via our own website the conversion rate for an enquiry becoming a booking is more like 1 in 3, so this shows how important it is to be able to discuss requirements up front in detail.
I therefore think that Bark's approach may eventually encourage some suppliers to bend the truth regarding what they are offering to get the job and recover their investment. I'm not saying this is Bark's fault, they are totally up front about how it works, but it's not a modus operandi that I would want to use.