In this episode Don and Harry try to get the The Rolling Stones to endorse Heinz Beans. In 1967 The Who released an album titled The Who Sell Out in which the cover art has Roger Daltrey bathing in Heinz Beans.
Toward the end of this episode, Ginsberg goes home and sees his father, who insists on saying something to him in Hebrew. What he is saying is one of the primary prayers of Judaism, the Priestly Blessing, which is often offered from parents to children at momentous life occasions (like a Bar Mitzvah) or from a rabbi to a congregation from the bimah (pulpit). The Hebrew words ("Yevarechacha Ad-nai v'yishmarecha...") translate to: "May the Lord bless you and keep you; May the Lord make his face to shine upon you, and be gracious to you; May the Lord lift up his countenance onto you, and give you peace." This is a passage from Numbers 6:24-26.
The mentioned jingle that The Rolling Stones did "three years ago" was for Rice Krispies in England.
The Heinz people want The Rolling Stones song "Time Is On My Side" to be use in their commercial. Not only would they have needed to get the band's permission to use the song, they would also needed to get permission from the song's actual writer, Jerry Ragovoy (using the pseudonym "Norman Meade"). It had been recorded by another band in 1963, so The Stones' version, which is still the quintessential version, is essentially a cover song.