Don't forget, when your relatives are "vetting" these cases prior to deciding whether to sue, they're still billing their time regardless of whether the information comes out investigations or in response to an interrogatory.
No they aren't because until the case has been vetted a legal contract is not even offered. And if it's a contingency contract then the bill is based on the award and actual billing time is irrelevant. Of course, expected time is considered in that there are multiple contingency fee levels starting at 33% and rising higher if the case goes to trial and higher yet if it goes to appeal.