Faucet is a free bonus, stunna isn't actually getting anything from it other than heavy traffic and bots (to be fair it attracted gamblers to the site before when it was still young) but I doubt it would affect the profitability of the site for Stunna.
And the 0.001 is to avoid someone registering 100's of accounts and spamming all over chat after getting banned in one.. There have been spam spree's before.