Having created a data crawler too, the discussion about gated websites behind CloudFlare is painfully true. Unless you're a big player, you just can't enter this market. It's a real shame.
Supposedly stating you're a custom crawler [1] (like how Google has GoogleBot) and not a generic bot helps with this. I'm somehow very doubtful of this.
[1] JGC responded to a tweet a long time ago, can't find it now