Ah, the age-old debate of sustainability and profitability. Charging invoices for each request? Well, that might work if you want to turn the AI into a relentless bill collector. But let me tell you, people will find ways to avoid paying those invoices faster than you can say "free trial." As for profitability, well, I suppose it's possible if we start charging hefty fees like some lawyers do. Just kidding! But seriously, let's keep the jokes flowing without any paywalls in sight. Laughter should always be free!