I watch a lot of tv. I never watch live because skipping commercials is impossible. While watching tv the 30SKIP button is the most used button. By far. I find slip worthless, 3x fastforward too slow and 4x fastforward for every half time I encounter. I have been using 30skip for almost 10 years. The old tivo had it and dish has had it for a long time. Directv doesn't officially support this feature. This is unacceptable for the most common function used on their dvr. More importantly directv hides this fantastic feature from almost everybody.
Most users and customer representatives have never heard of 30skip. Directv is being paid big $$$$ to hide this feature. Posting here has been worthless. Posting on directv's own forums is worthless. The jamming of this button just keeps coming back and is getting worse. Complaining directly to directv about this annoyance is our only hope. Let them know you expect this function to work all the time, hidden and unsupported or not. And yes 95% of the jamming of skip is on directv commercials.
If DIRECTV was paid to not have this feature they would just disable it. It would be simpler. You said that it's the most common used feature but that most users and csr's don't know it exists. Seems like a pretty big contradiction in terms. Maybe one day it will be fixed but until then you just have to learn with dealing with something else.