Do I sense a theme? Both the Ford Escort GT, and the Ford Probe used Mazda plaftforms, engines (4 cylinders), and transmissions...
The Festiva was a restyled Mazda 121 assembled by Kia.
It was a pretty good relationship at the time. Mazda looked after the small cars, Ford did the larger vehicles. Ford gave Mazda a lot of help with logistics, marketing and such. Mazda helped Ford with quality control.
But Ford's big sellers were far and away the Taurus/Sable and Explorer. The Probe, Festiva and to a lesser extent Escort were niche products. The Escort was a slow seller until the sedan version was introduced.
When the Escort was finally replaced, Ford had made the decision to use in-house resources from Germany for the Focus, which turned out to be a pretty good move.