Just done a count and found The Badminton Secrets Newsletter currently goes out to badminton players in 61 countries:

UK, US, Canada, Philippines, Croatia, Poland, Fiji, Denmark, France, Netherlands, Germany, Czech Republic, China, Belgium, Malaysia, Iceland, Singapore, Japan, Portugal, United Arab Emirates, India, Ireland, Australia, Slovenia, Turkey, Indonesia, Mexico, Argentina, Qatar, Brazil, Hong Kong, Russia, Switzerland, Ukraine, Sweden, Romania, New Zealand, South Africa, Luxembourg, Bahrain, Bulgaria, Kenya, Taiwan, Greece, Cyprus, Georgia, Egypt, Vietnam, Cambodia, Norway, Ecuador, The Congo, Zambia, Lithuania, Myanmar, Italy, Bhutan, Hungary, Nepal, Mauritius & Estonia!

Keep it coming!