seeing that there are no latest updates on the project. it is safe to say it was a failure or didn't get enough attention from the cryptocurrency enthusiast. although I am not sure if they discontinued the production of the specific product. kudos to the company trying to be innovative toward the application of blockchain but they could have done better.
anyway, if anyone is interested Shenzhen Timing Technology Co., Ltd. is the name of the company and 32teeth.cn is the name of the website for their toothbrush products.
Perhaps, the best application could be for fittings as people are exerting amounts of energy to continuously do things that could possibly be used for benefit of bitcoin mining. But I just can't imagine how the product works, if you are brushing your teeth, the energy it could provide is very little, or are they still connecting it to power? If so, it was unsafe to brush teeth with power plugged. Perhaps, the effort you could give is very minimal meaning, with huge farms competing and drawing a huge amount of energy, the bitcoins you could mine will possibly be very little or close to nothing.