Means to devalue company's reason for producing fewer Teletubbies? (6,4)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

I’m not sure I get this. The definition is a straight precis of business practice when fighting off, say, a takeover bid. “The” Pill is responsible for lowering rates of reproduction. But why poison and why Teletubbies? Enlightenment, please… has dawned. Tinky Winky and Dipsy are male, and Laa-Laa and Po are female, and whatever they get up to in private has limited results because “Po is on pill”. Innocence shattered.