Well, that's one of the reasons I declined OP's offer: the vast majority of things I pay for online I need delivered home or they're bills for things related to my home, meaning they'll know my identity anyway.
And for the rest, fear I won't use the card for enough transactions to offer a really fair feedback in a fair amount of time.

But I'm sure that there are many that purchase a lot of digital goods, and may even get more of them these days, as Easter presents. Those could be suitable for providing a review.