So what's actually being said to me is this...
- We don't have enough faith in what you do to pay you properly now, so if you fail we need to limit our financial exposure
- But if you do happen to succeed then we propose rewarding our own bad faith with a continued discount
And the client usually believes that he's doing me a favour!
The assumption underpinning the proposal is that I'm not in enough demand to dictate terms and that it would be better for me to sell my time to them at a discount than sit at home earning nothing. In short, the client is behaving like a company but treating me like an individual.
If I'm going through a less-than-busy period it's tempting to agree to the deal but the pitfalls are obvious; the best case scenario is that I have to turn down higher-paying work with other clients because I'm committed here. The worst case scenario is that word gets out and I'm forced down to this new price across the board.
I can't say 'never accept a trial pricing offer' because there are times when they make sense; for example when the client's offer of (a lot) more work equates to a genuine 'discount for bulk' or when your cash-flow is so dire that anything's better than nothing.
But I can say this: it is no one's interest but your own to keep your prices high. If you don't protect your fee structure no one else will.