I would say £300 for a straight swap labour only wasn't that shabby!! the large national company I do bits fro pay every time, they even send out reminders to say they have yet to receive my invoice!!
So I think to say out right that its a scam and all that take part will be ripped off is a bit harsh!! but that said we need to step in lightly as there are many scams out there!
I'm slightly tempted, as a top up to my own work and would consider 1 this mouth get paid, then another, get paid and go on from there!! then maybe a couple a month to top up!!
Three is someone somewhere making a lot of money off the back of these schemes, why if we can, should we the sole trader / the small firm not have albeit a small slice of the pie??