This is a good question. Thanks for asking.

First I just want to make it very clear that we aren't guaranteeing ziftrCoin will work with every merchant on our existing shopping site. We do have our "foot in the door" with many of them and in addition we have years of experience working with their sites on a purely technical level. We're also going to be doing everything we can to get as many retailers on possible (big and small) using our ziftrPay system. In fact a large part of the funds from the presale is going directly towards this goal.

As part of this we're working to make it so that our shopping tools work with many crypto currencies, multiple exchanges, and (most importantly) are extremely easy to use for both shopper and retailer. Something in the ballpark of 2 clicks for a shopper to buy things and a simple signup process for retailers to sell things. Decentralization is also an important part of our coin, so anyone is free to accept it directly (the same way they can now with bitcoin, litecoin, dogecoin, etc) if they, for some reason, don't want to integrate with our tools directly. We, of course, can't guarantee the $1 value at those merchants not using ziftrPay.

We're also changing our FAQ to make this more clear and better answer questions like this.