Although I have never consciously been obsequious to a purpose, I have employed strategy, but probably only once or twice in a lifetime. There do exist occasions, hopefully very rare, wherein one would come to serious harm were one not to do so. The other situation is where the hurt to someone else by stating a whole truth is likely to be so great that kindness impels us to stop short of revealing all - the so called white lie, most frequently in the form of a lie by omission.
My own adoptions of these ruses must have been few because I actually remember them. For many people, strategy, game playing, bluff and double bluff are the very fabric of life, especially in the higher regions of business and the workplace. However, the curious, and rather sad consequence of habitually implementing strategy is that over a long period most of your assertions will be considered false. That is a terrible price to pay for transient reward.