12 January 2021, 12:56 am EST By After Tesla CEO Elon Musk tweeted "Use Signal" on Jan. 7, the messaging app became the talk of the town, even boosting the stocks of yet another company, Signal Advance by 1,100%. This is because the messaging app is only donation-backed. Aside from the surging number of downloads after Musk sent his tweet, the CEO also revealed that he already donated to the company and has plans to donate more. (Photo : Signal) Elon Musk to donate more to Signal app Musk promotes another encrypted messaging app to uphold people's privacy and safety after WhatsApp updated its terms. This led to an influx of downloads from his fans and supporters, further boosting the app's popularity.