Given how inept they've become since they were sold a few years back I wouldn't put anything past them - I went there recently, logged out, and there seemed to be some other customer's name, address and phone exposed on the main page - but this sounds more like malware or a change in policy at the DNS server you're using. If it really is a new Name Silo idea then it's the final nail in the coffin for what used to be probably the best registrar.
I stopped using them a while ago, but for new registrations you could set the name servers when you were registering, so they were established immediately (a good system not employed at most/all other places). This may not stop the issue you're talking about though, if it simply applies to any new reg.
Edit: Do you have a screenshot of the PPC landing pages? Or even better source code.
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