Guys, the Support Team do have a lot on their plates, but I assure you they will get back to you as soon as they can. In the meantime, let me clear up a few things:

In the post linked by Ποσιδονας, Jeeves is referring specifically to cases in which users have reset their Advertising ID. Let it be known that these cases are totally separate and everyone experiences a lack of available videos sometimes. Just because you have no videos available at the moment, that does not mean your account was flagged by the provider.

To get to the point, the 2x bonus videos won't always be available, even if you're able to watch regular Booster/Cash videos simultaneously. The reason for this is that the 2x videos work with a different availability, despite being offered from the same providers. In other words, videos for boosters and 2x training might not be directly connected, but they still work by the same principle: they come and go, depending on the various demographics of your account.

Check this post, again courtesy of Jeeves, where he explains the principles of the video availability.