Perhaps sleazy was too strong a word ... it just seemed "cheap". When someone offers you something for free, the first question is -- what's the catch?

I don't think their catch is bad at all -- it's standard platform marketing to offer a free trial. But at least link to your pricing. Say what the limitations are of the free version and what you get for paying. It should be easy but instead it left me wondering and it took several clicks to find what it was all about.