I wouldn't assume that any given service is secure just because it hasn't been outed yet. Your guess is as good as mine with regard to which service is more secure or less secure.

What is immensely important is to raise the cost of lying to where it becomes something investors care about. The only real thing a company and its investors are afraid of is losing its customers.

If we teach companies it is okay to lie by staying with them, they will lie more.