Great work! It's funny that YC funded Segment as well as two direct Segment competitors (RudderStack is the other one, though I think they initially started with a different idea an pivoted to that afterwards), though given the size of YC this is probably expected and Segment is probably large enough to "deserve" some good smaller competition.

As someone who also builds an open-core product (though not directly modeled after an existing closed-source product) I really hope this kind of business model will become more accepted.