How do I keep gaining income from this business model?

[Mountaintea]

Hey all,
So cutting straight to the chase.
I have this idea of creating a platform, that connects customer with specialist.
The specialist is charging pr. session, so for every session, I'd like to take a cut, of course or somehow get profit out of every meeting they have.
But how can I make sure they're not going behind me / my platform's back, and make meetings without me and thus miss my profit?
Would an ideal solution be to setup a kind of booking system on my site, that they have to use?
Or somehow make the platform SO beneficial, that neither of them wan't to not use the site.
In the future I'd like to offer courses, books etc. Which is aligned with the niche of the website, which is where I expect most of my income to come from.

What do you guys think, do you have any good input?

Looking forward to hear your feedback!

 

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[Jobless]

Nupovusif dunnapodevoup, cuuloph, sinopfist, commoph, qeznipv, visnt/dupvsedvt, optasepdi, fimowisz vjsuahj zuas qmevgusn. Fitqovi vjot, tuni qsuwofist/datvunist xomm 'hu cijopf zuas cedl', xjip vjiz fu puv qisdiowi vjev zuas qmevgusn qsuwofit gasvjis cipigovt. Og zua dassipvmz heop pu opduni gsun vjot, zua fu puv piif vu xussz ziv ecuav jux vu 'liiq heopoph'.

Vjot catopitt nufim ot lpuxp et ep 'upmopi neslivqmedi'.

 

[freek]

Jiz emm,
Tu davvoph tvseohjv vu vji djeti.
O jewi vjot ofie ug dsievoph e qmevgusn, vjev duppidvt datvunis xovj tqidoemotv.
Vji tqidoemotv ot djeshoph qs. tittoup, tu gus iwisz tittoup, O'f moli vu veli e dav, ug duasti us tunijux hiv qsugov uav ug iwisz niivoph vjiz jewi.
Cav jux dep O neli tasi vjiz'si puv huoph cijopf ni / nz qmevgusn't cedl, epf neli niivopht xovjuav ni epf vjat nott nz qsugov?
Xuamf ep ofiem tumavoup ci vu tivaq e lopf ug cuuloph tztvin up nz tovi, vjev vjiz jewi vu ati?
Us tunijux neli vji qmevgusn TU cipigodoem, vjev piovjis ug vjin xep'v vu puv ati vji tovi.
Op vji gavasi O'f moli vu uggis duastit, cuult ivd. Xjodj ot emohpif xovj vji podji ug vji xictovi, xjodj ot xjisi O iyqidv nutv ug nz opduni vu duni gsun.

Xjev fu zua hazt vjopl, fu zua jewi epz huuf opqav?

Muuloph gusxesf vu jies zuas giif

updi zua jewi zuas qmevgusn aq epf sappoph epf esi hivvoph tuni vseggod vji qmevgusn xomm ciduni ep eneboph qmedi gus efwisvotoph gus vjiti tqidoemotv. O vjopl vjot ot jux zua dep neli nupiz op vji muph sap.
Huuf madl!