How to make Polymer and Yandex friends?

Question

Search Engine Optimization

There is a known problem with AJAX/JavaScript indexing by Yandex, especially if we talk about Polymer from Google :) For the problem with Angular, there were services that took page snapshots and gave them to html for search engines. Some of the services were closed after Goole started working normally with such pages.
The question actually is, what solutions do you know to this problem? Do you know similar snapshot services that work with Polymer?