How commissions shape tutor behavior
On a 33%-commission platform (Preply), a tutor charging $30/hr nets $20/hr. To make a living, they need volume — many short-term students, lots of trial bookings, churn-and-burn. The economic incentive is acquisition not retention. On a 3%-commission platform, the same $30/hr nets $29.10. They can sustain a smaller roster of long-term students. The economic incentive is retention not acquisition.
What you experience as a learner: retention vs acquisition
On retention-incentivized platforms: your tutor invests in long-term plans. They remember what you discussed 2 months ago. They build curriculum that compounds over a year. They want you to STAY because they make more from year-long relationships than from new trial signups. On acquisition-incentivized platforms: your tutor's energy is on getting new trial students; you become 'maintenance' — competent but not exceptional service.
The trial-lesson trap
Acquisition platforms often subsidize $1 or free trial lessons. Sounds great. Reality: tutors who do trials get burned by no-shows + low-converters + students who shop around. Most trial-heavy platform tutors do mediocre trials (no prep, generic script) because the math doesn't work to invest 90 minutes prepping for someone who's 30% likely to book. On retention platforms with normal-priced trials, tutors prepare seriously because every trial is qualified intent.
What the math actually looks like
Tutor on Preply at $30/hr × 20 hours/week = $600 gross. -33% commission = $402 net. To replace a $45,000/year salary requires ~21 paid hours/week + dozens of unpaid trial + acquisition hours. Tutor on Koydo at $30/hr × 20 hours/week = $600 gross. -3% commission = $582 net. To replace $45,000/year requires ~15 paid hours/week. Same tutor + same student spending = different work shape.
Why this affects your learning quality
A tutor working 15 paid + 10 prep hours per week (Koydo math) writes you a custom curriculum. A tutor working 21 paid + 15 acquisition hours per week (Preply math) recycles the same lesson plan for every student. They're not bad tutors — they're optimizing rationally for their incentive structure. Different platforms produce different tutor behaviors.
The honest comparison
If you want a tutor who knows you, builds curriculum around you, and treats your year-long progress as their KPI — pick a low-commission platform. If you want any tutor, fast, for a one-off check-in or specific exam — high-commission platforms have more inventory. Both have a place; they're not the same product.