I think there is evidence the tax was not abolished and was
still collected in the 3rd c. If this "sublatio" is so widely advertised on
Roman sestertii, it means that it is supposed to benefit
Roman citizens, that it is
good news for
Romans, not Jews. It was a frequent tradition for
Roman emperors, in the first years of their reigns, to pardon some fiscal debts and proclaim that from now on accusation letters would be ignored. This is what
Trajan writes to Pliny the Younger, for example, about the accusations he could receive against alledged christians.
For me, I understand this
sestertius as : "False accusations of evading the Jew Tax will be ignored from now on."