Shows like I Love Lucy had more than one advertiser sponsoring it.
Matt Smith said:Actually, I Love Lucy was sponsored in its first run by Philip Morris, a cigarette manufacturer, and all of the commercials featured Lucy and Desi smoking up a storm with the advertiser's product.
When Desilu began syndicating the show off-network, they removed the sponsorship material, made a new intro and close for the show, and added bumpers to alert stations for commercial insertions.
tested said:In the early days of television, shows were frequently sponsored by just one company. "The Texaco Star Theater" comes to mind as a good example. From the name of the show to ever ad run in it, the show was sponsored by Texaco. That system changed though as networks looked to get more money from more advertisers. Shows like I Love Lucy had more than one advertiser sponsoring it. Pretty much every show went that way after a while. It's been that way ever since.