[lxst]

One example would be Calendar. First they announce that they retire EAS for CalDav. A few month later they announce that CalDAV will be deprecated and only available for selected developers and other services should use the proprietary Google calendar API.

Which is kinda sad as Google could have really improved CalDAV with their move. Now it is back to "walled garden".

[tomkarlo]

While I think that pattern sucks, I'm not sure that "not supporting" a standard constitutes "sabotaging" it. There's a big gap between "promoting" and "destroying/undermining", it's not either-or. Saying Google "sabotaged" a standard implies that they somehow made it unusable for everyone.