Monthly fee for everyone or you mean freemium? Freemium in my opinion wont be enough to cover the cost, because works well only with services with low cost per-user. And monthly fee for everyone is a very hight incentive of not using YouTube.

I've tried time ago but it seems to take the results and nothing else (I mean, no summary on top of the results, no table with restaurant number/time of opening ecc..) -> I don't know how to call this

It shouldn't be possible to break any service but hackers do that daily. If proper security is in place they will need some 0day exploits, but it's not impossible, just extremely difficult

I know, but that won't change the eventuality I described

Bro, what I said is that an attacker who someways get access to production, can push modified source code that send cleartext password to him before everything else.

Refusing to work, just sitting on a chair doing nothing even when asked directly by your boss

I'm from Italy and i drink tap water since I was child. Never had any problem. But I was told to check tubature aging and materials first, if it's new and not made in lead metal, it's safe.