Rule 2 is a little gray but if the title reads like a catchy headline, then it's probably not a complete thought. Another way to think about it, the title should make you want to read more because it's a good thought, not because it a cliff hanger.
OP, would you mind updating the title with a little more context?
For example if you added "because they are providing training data" to the title. It would seem more like a complete thought to me.


Liberapay is really nice. I like the payment options they have to minimize the fees, like making 2 years of small "monthly" payments in a single charge to your bank card.