Unidentified Flying Objects have always existed. In the US, around 99% of submitted cases were identified eventually or revealed to be bogus. The remaining 1% exist, but the track record of identified stuff doesn’t give the alien explanation a high likelihood.

You divide by the old price, not the new one:

12.5 / 8 = 156%

Generally a good rule, however Signal did develop their own encryption. It was so good it became the industry standard.