Almost all users seem to fall under control group with current experimental setup.

[
    {
        "name": "AlwaysDisplayTestExplorer - experiment",
        "salt": "AlwaysDisplayTestExplorer",
        "min": 80,
        "max": 100
    },
    {
        "name": "AlwaysDisplayTestExplorer - control",
        "salt": "AlwaysDisplayTestExplorer",
        "min": 0,
        "max": 20
    }
]

Logic for checking if you are in an experiment: In Experiment(foo) =HASH>=min and < max.

Probable Bug : We expect to get HASH from CryptoUtils, which apparently is always returning 0 as hash value, so users always fall under AlwaysDisplayTestExplorer - control group.

export class CryptoUtils implements ICryptoUtils {
    public createHash<E extends keyof IHashFormat>(data: string, encoding: HexBase64Latin1Encoding, hashFormat: E): IHashFormat[E] {
        const hash = createHash('sha512').update(data).digest(encoding);
        return hashFormat === 'number' ? parseInt(hash, undefined) : hash as any;
    }
}

In the code, parseInt is being used incorrectly. Pass a second parameter, 16 to it instead of passing undefined, so it correctly parses hex encoded string to int.