My snapcredits are exactly equal to what I paid for the snaps (87 at $48.99 each). So, at least Snapnames is being fair about this. My only loss is that I have lost "exclusive" Snap chance on some very good domains, and once in a while I actually caught one. After going for hundreds of 3-letter .com domains with Snapnames, and not having caught one for a couple of years, I actually caught a decent one back in November. The reason that I bought so many Snaps (was up to 200) is that it appeared that they would convert into WLS slots, which would have been fantastic. Oh, well.
Of course, having this big credit and being able to use it well depends entirely on Snapnames's ability to compete with Enom & Pool.