The popularity rating of email_validator explained

Github Repository Rubygem
The highest rated repository is rails/rails with 30890 watchers and 12525 forks, resulting in a Github score of 99.99 The highest rated Rubygem is rake with 111305426 total downloads
These are the references for the score, marking the popularity of 100%
Now, the repository for email_validator over at balexand/email_validator has got 386 watchers and 27 forks, resulting in a Github score of 0.56 Now, the gem email_validator has got 735721 total downloads
Therefore, the relative popularity percentage can be calculated for email_validator
0.56 watchers & forks * 100% = 0.56%
99.99 top score
735721 total downloads * 100% = 0.66%
111305426 top score
The average of those two values results in the score:


So, assuming everyone is using the most popular projects,
roughly one out of 100 Rubyists use email_validator

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Although the Github Authorization page does not mention it, the request includes read-only access to your verified email address (user:email OAuth scope). This is neccessary so there's a way to notify you about comments, information about your accepted project edits and the like. You can review your notification settings on your account page once you're signed in.