Thank you for your response. The approach of "delete everything once a month and replace it" is not something we do in OSM, ever. If the third-party data really is so much better than our own data then users should simply load the third-party data in addition to ours, but we shouldn't degrade OSM to be a "delivery vehicle" for third-party data. 

Also, it is still completely unclear to me if IETT even agrees to having their data copied into OpenStreetMap.

These are things that need to be discussed with the whole Turkish community before an import can proceed. 

I have now removed the data that has been imported by you. Thank you for making your script available; the Turkish community can take this up if they're interested and after they have clarified the legal situation.

