1550: Is DC Rainmaker world champion in selling OHRMs?: – was he the one who catched the attention of scientists so that they started testing the Polar OH1 with a g.tec medical device for 50 000 USD?

Was it not DC Raimaker who managed to sell the Polar OH1 even to scientists?

https://www.dcrainmaker.com/2019/03/polar-oh1-plus-optical-hr-sensor-in-depth-review.html

Even scientists became interested in the Polar OH1, and tested the HRM with a 50 000 USD g.tec medical multi-purpose device:

and wrote a paper with it:

Validation of Polar OH1 optical heart rate sensor for moderate and high intensity physical activities

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0217288

But then Polar made a firmware update of the Polar OH1:

1520. The completely incomprehensive strategy of Polar concerning how Polar deals with scientific papers about Polar HRM accuracy studies

And did as a consequence not many scientists loose their interst in OHRMs? And only 52 seem to be still interested in it:

1540. Do only two scientist remain who do scientific studies withs OHRMs: Rob ter Horst & Peter H. Charlton? – No!