Might I direct you towards the copyright terms on landdirect.ie which you will find under "Terms and Conditions": 
"Copyright
16. Save where otherwise appearing, the material provided through landdirect.ie is subject to Tailte Éireann copyright in accordance with the provisions of the Copyright and Related Rights Act 2000 (No. 28 of 2000).
17. Permission to reproduce Government copyright material does not extend to any material on this site which may be the property of a third party. Authorisation to reproduce such material must be obtained from the copyright holders concerned.
18. Land Registry digital maps accessible through the landdirect.ie service and the aerial photographs which may be viewed online incorporate Ordnance Survey Ireland (OSi) mapping data and ortho-photography respectively, under a licence from OSi. © OSi and Government of Ireland.
19. landdirect.ie also incorporates information licensed from GeoDirectory, a product developed by An Post and © GeoDirectory."

It's not OSM who decided to make this not open data; that was the Irish government. So please delete the data from OSM, unless you have a waiver from Táilte Éireann, Eircodefinder and An Post.

Thank you for mapping the buildings and house numbers - hoping you got the house numbers from the doors.