There is a lot of criticism of people who start threads without doing searches but we have to also be able to admit the truth: The search function is of very limited help.

Let's say I want to find out if Delta offers a bonus for bringing in new SkyMiles benefits.

Yes, I will restrict my search to the Delta Forum, but what keyword do I seek?
"SkyMiles", "bonus", "new", or "members" will all get the 500 hits which is the maximum shown. (And if there was no maximum there would be many thousands of hits for all of these words.)

Until a search offering the possibility of seeking out a combination of words is possible, we have to expect new threads to be started on old topics.