There is another reason why some of these calls may be made: due diligence before investing in a competitor. This would explain why VC's ask for an explanation of things that are obvious and available on the website: they are looking for any unreported changes, and trying to get some nuance by talking to a founder.
I like the WuFoo folks and have been impressed with their approach and their application ever since I saw them at the first Office 2.0 conference, but one thing they may not appreciate is that their business stands as a beacon pointing at a large and profitable market, and their lack of desire to take funding means that some other team may be using them as a proof point. Naturally a VC firm will contact them before making an investment in a competitor. I am not suggesting that it's every call, but it's likely to be some of them.
I like the WuFoo folks and have been impressed with their approach and their application ever since I saw them at the first Office 2.0 conference, but one thing they may not appreciate is that their business stands as a beacon pointing at a large and profitable market, and their lack of desire to take funding means that some other team may be using them as a proof point. Naturally a VC firm will contact them before making an investment in a competitor. I am not suggesting that it's every call, but it's likely to be some of them.