Its a risk vs rewards question.

I jumped on valuemags for a few hundred $s since I wanted some magazines anyway. Worked out after a number of phone calls etc. In retrospect, Iam not sure if it was worth it. Maybe it was, because that is what got me hooked to FT and miles mania.
Iam still kicking myself for sitting out the 1800flowers promo, I was afraid I will be struck with a few GCs that I could never use.
There was an earlier delta signup bonus for 10K miles 2 years back,I did that and this is the second one.
I missed the inetercontinental /delta, but i dont think I would have signed up.