Extension:BetaFeatures/betafeatures user counts table

feature
Primary key.

number
...

Schema
mysql> describe betafeatures_user_counts; +-++--+-+-+---+ +-++--+-+-+---+ +-++--+-+-+---+
 * Field  | Type           | Null | Key | Default | Extra |
 * feature | varbinary(255) | NO  | PRI | NULL    |       |
 * number | int(11)        | NO   |     | 0       |       |