1. It has generated significant attention- which has value.
2. Like a BMW 1-series, I imagine the idea is that once people have the "beginner" version, they'll aspire to upgrade to the real thing. It gets people "on the boat".
3. Rolex sells a cheaper version of their flagship watch under the Tudor brand- it's virtually identical and hasn't diluted Rolex's brand value.
4. The funky colors is probably less to do with style and more a guarantee it'll never be confused for the "real" version.
That all said, I would definitely still be salty if I owned a Speedmaster. But I applaud Swatch for making bold and interesting moves- which doesn't exactly happen much in the luxury industry.