Yes, I understand the importance of marketing, but there are limits, dammit! “Oh, that’s great! Now there’s just one more thing…” starts to wear thin after the third iteration.
Seriously, if you’re prepared to let people take advantage of you, there are many, many people who will have no qualms whatsoever about doing so.
It’s essentially a translation of the free milk / unpurchased cow scenario into the business world. The results are the same, however: someone gets screwed.