Yesterday they released a new version of MoPub framework which seems to be better, however it still impossible for me to archive the project:
bitcode bundle could not be generated because ‘[…]/MoPub.framework/MoPub(libMoPub.a-armv7-master.o)’ was built without full bitcode. All object files and libraries for bitcode must be generated from Xcode Archive or Install build for architecture armv7
Do you succeed?