How to fill up a W-8BEN form for receiving money from a US sponsor (I live in the Philippines)?

So I'm a YouTube creator from the Philippines and I make guitar videos. I was contacted by Reelio (a third-party sponsorship company) about Lenovo wanting to sponsor one of my videos. We agreed on a certain CPM and the lifespan of the advertisement.
Now it has concluded and they sent me the receipt with a note that the total amount is subject to Paypal s standard fees. There was nothing on the receipt about tax but they also sent me a W-8BEN form to sign.

The problem is I'm not quite sure if I should fill the form?

And, if I do, exactly what type of income is it considered? I want to claim tax treaty benefits. I reviewed the tax treaty between the Philippines and the US and the one that I think it might fall under is Independent Personal Service or Artistes and Athletes. Although I'm really not sure. And I'm not quite sure what to put in the "Explain the reasons the beneficial owner meets the terms of the treaty article" section.

Any help with this will be greatly appreciated!