All great points, and I appreciate them because I think CodeApprove's marketing materials should address them more head on.
The first two (trust with repos and GitHub API rate limits) don't really apply to CodeApprove in the same way they do to Reviewable. Because we're using GitHub's newer "apps" system and not OAuth, we only have very limited scopes (can't write code, etc.) and API rate limits go up as we get more users.
Your points about stacked diffs and PR adoption stand!
The first two (trust with repos and GitHub API rate limits) don't really apply to CodeApprove in the same way they do to Reviewable. Because we're using GitHub's newer "apps" system and not OAuth, we only have very limited scopes (can't write code, etc.) and API rate limits go up as we get more users.
Your points about stacked diffs and PR adoption stand!