Context menu support in thunar is still missing as of 3.0.27.40677. I understand that you all have acknowledged some development problems with version 3 (OFFICIAL: Insync 3 Formal Statement).
Part of the problem with the version 3 rollout has been a change in how insync works without a solid explanation of those changes and what settings need to be changed or monitored with the update (as noted in this thread and the other I posted in).
Tech writers are nearly as important as the coders. If the explanations are wanting, the coding fixes will not matter all that much, as folks will not know what exactly has been fixed.
So, please push out some more explanations. I would like to know when thunar integration is expected.