No. See here (the full BW T&Cs):
EARNING POINTS FOR STAYS
All stays are eligible to earn points (“Eligible Stays”) with the exception of the following (Non-Eligible Stays”):
Stays booked through online travel agencies (“OTAs”), such as priceline.com, expedia.com, travelocity.com, booking.com, kayak.com (i.e., channels other than Best Western branded booking channels);
And Agoda is simply another of those.
Why do you want to book on Agoda? If it's because you get a lower rate, you should try for a
BRG (Best Rate Guarantee) instead.