Hello,
In answer to your question, in my last Spine work we used a bit of 2.5d, but not to often, only a few stories had human characters and animations assigned that really need it.
I'm a 3d modeler and animator too, this helped me to rig those characters for the other animators that worked with me to recreate the 2.5D, and supervise their work, as I was in charge of the animation team.
If still want to go on with the test, I send you an email with the paypal account information.
Thanks,
Borja