First of all let me say that I've worked on deferred payment projects before, and I'll do so again; it's a great way for micro-budget productions to shoot above their weight, and sharing the increased rewards if they get away with doing so.
I'm a producer rather than a performer, so I've got a rather different perspective -- although I wouldn't like to say whether my opinion is typical of the species...
But if I were casting (or crewing) for any project, an applicant who actually expressed an interest in the project's future would score extra points with me for doing so.
If it's a commercial project then I'd far rather hire someone who wanted to know what its chances of success were, how much success was expected, what the plan was for generating that success.
The alternative is a jobsworth with no real interest in what I want to achieve, they're just there for a day's pay or another credit; or someone who's blanket applied for everything and hasn't asked the question because they haven't even been bothered to read that far through the advert. There are more of them out there than you might think, and I for one aim to avoid them.
Sure, there are right & wrong ways to ask -- but as an actor one would hope that basic communication skills can be taken for granted. But not to ask about deferral if it's been stated, suggests that either:
* you haven't paid any attention to the info you've been given;
* or that you assume my baby is doomed to failure (or that I'm a crook) & therefore the deferral is worthless;
* or at best that you just have no interest in what is supposed to be a team effort, beyond your own part.
None of the above stands you in as much stead as the enthusiasm implied by asking.
That's my story anyway, and I'm sticking to it :-)
Incidentally, separate point: I know not everyone makes the distinction, but I'd suggest there are two different things being blurred together here.
One is fixed fees, put off until sufficient revenue has come in to pay them (which is what I normally mean by "deferral"). That still depends on the project generating sales (and in many cases, enough to repay the investors first), but it's safer in that there are fewer accounting tricks to hide behind, and you've got a specific cash figure on the table. Safer, but capped.
The other is profit sharing. This is usually a percentage of Producers' Nett Profits -- ie (being cynical) the part of what the project makes that the accountants can't be bothered trying to hide anywhere in the cost budget. This is a lot more tenuous, far more likely to come out at a big fat zero... but if the stars are aligned and the project makes a huge profit, your points can be worth tons (Alec Guinness made more from 'Star Wars' than from the whole of the rest of his career, because he was one of the very few who was "foolish" enough to give up his fixed fee in favour of a percentage).
Points (and to a lesser extent, deferrals) are a gamble; the chance of the gamble paying off depends on the project's financial structure (DON'T confuse "Gross", "Producers' Gross", and "Nett"!); how good the script, cast & crew are; how good the sales strategy is; and whether the gods smile upon you, among other things. How big a risk you're prepared to acccept is obviously up to you to decide (but as I say many productions simply can't afford to offer you anything like as much, if you want 100% guarantees or cash up-front; that's just the way it is).
Back to the beginning again: by asking you to take a deferral (or points), we (the producers) are asking you to join our gamble, to speculate on our project's success along with us -- in effect to invest your earnings in our business venture. To suggest that it would be impolite for a potential investor to ask a little about the business plan is faintly absurd.
And if you're ever offered such a "blind" investment opportunity, by an entrepreneur who's disappointed or offended when you ask them about what your investment actually buys you... get the hell out of Dodge!
Just a suggestion, of course.
Luv'n'Hugs
David