I assumed that 100 GB per day was meant to be further in the future. But just imagine that: that's about 500 million Bitcoin transactions per day, which would mean mass adoption has been reached.
Or a few spammers who want to store 4k movies on-chain. With 700 MB block clearing up the mempool every 10 minutes, you could store gigabytes of movies for a nickle.
With the minimum of 1 sat/byte, storing movies would still cost $650,000 per GB at current Bitcoin price.
In my place, they do hate it when you're asking to pay with card for anything lower than 5€. They'll find an excuse that their POS is broken, and accept only cash for the moment.
Here, banks charge up to 0.5% or more to deposit cash (coins), and €0.50 per roll of coins if you need them.
As a merchant in a competitive economy (tons of take-away cafeterias) is it worth losing a potential income of €1,99, just because you're greedy and you want €2,00?
Could it be the €2 is off the books and won't get taxed, while the €1.99 is handled officially?