[nialv7]

You are not solving the privacy problem. You can be easily identified by your custom domain, unless there're a couple thousand people using it.

[secmax]

That depends on your definition of "solution". The scheme protects you (to a certain degree) from automated creation of inter-site profiles. The reason is, only very few people employ (a variant of) this strategy, so trying to "deanonymize" is costly and usually not worth it economically.