Agree with this. I also think the emphasis here (to OP) should be "I'd be willing to happily pay for it" - ie I'd rather be paying a reasonable amount each month for something that is going to remain active that have the large (current) disparity between "free" and "enterprise". I'd say make some middle tiers of (I don't know?) $5 / $10 / $20 a month for reasonable numbers of queries or whatever. Keep the "enterprise" offering there for the biggies, but offer us small players some hope that this will be sufficiently funded / supported.
Brilliant idea, btw, I like it :-)