For the sale of courses, we made a webinar funnel: target - registration for a paid webinar - warming chain - webinar - the main course.
But this strategy did not bring success: 614 conversions of 9.57. Of these, real sales of 340 at 17.2 rubles per sale. The online webinar was watched by 150-200 people. Conversion to purchase of the course 2%.
After that, there were several more attempts to set the target, but they had a similar result.