The benchmark I use for any promotion is value. Immediately create some value. If there is a high probability that the people you want to reach gain some value

The benchmark I use for any promotion is value. Immediately create some value. If there is a high probability that the people you want to reach gain some value out of your (self) promotion, do it. And I mean not the value of the product / you behind it, the value of the promotion itself. If not, don't do it. Also applies to multi-million $ campaigns.