The -bin prefix is used for packages that package upstream binaries but the assumption is typically that the resulting package is functionally equivalent to the one built on Arch from source. That is why our policy is to delete -bin package variants of binary packages in the official repos.
In this case, the upstream binaries are not functionally equivalent because they are statically compiled and thus avoid a bug. They should be allowed on the AUR, but the prefix should be something to indicate that it is not just a -bin variant of the official package. Perhaps -static-bin would be appropriate.
The real solution is though is to fix the packages in the repos.
Sorry, I was in a rush. That should have been "statically linked", and "suffix". Regards, Xyne