A time-based trial records the date you started to use it somewhere.
A usage-based trial records the number of times you've done something somewhere.
I can't see why there would be any difference in reliability. The mechanism of recording and checking some value is identical.
So my point stands. There's no difference in reliability.
The trial state isn't like a cassette tape that degrades in quality each time you record over it!
A time-based trial records the date you started to use it somewhere.
A usage-based trial records the number of times you've done something somewhere.
I can't see why there would be any difference in reliability. The mechanism of recording and checking some value is identical.