They aren't targeting big companies for sure, but maybe a small or medium-sized office could make use of this.
There's no middle ground where you try to run a real business on old laptops. That's insane. You either keep things small/hobby and stay simple, or graduate to production-grade equipment once you have real requirements.
The middle ground, taking on production colocation problems plus the unreliability of random hardware, sounds like the worst of both worlds. There are both simpler and more robust options.
In Australia, for example, we're capping out at 100Mbit/s upload speeds on plans that cost ~US$70/mo and regularly go down for maintenance.
In other countries with cheap symmetrical plans this may make more sense.
Just do the math: for a measly €2000 a month, a salary of a cashier in Amsterdam, you already need to have 285 clients - and this is without taxes and revenue.