[andrewingram]

Absolutely, the anonymisation method is an important consideration. You can probably safely drop most user-specific data, like any tracking you've done. Unless the dev is building functionality that actually depends on that data, such as data-mining, they're unlikely to need it.

I'll make another argument in favour of production dumps though. It gives developers a proper feel to how a website functions. For UI-oriented developers like myself, having just enough data to allow the website to function on a technical level, isn't enough. Your search code is going to feel very different with 20 million products vs a few dozen dummy products.