“Allowed and supported” is something different then “its possible”. The article mentions some points that seemingly haven’t been “supported” in the past:

• Stop requiring Google Play Billing for apps distributed on the Google Play Store (the jury found that Google had illegally tied its payment system to its app store)
• Let Android developers tell users about other ways to pay from within the Play Store
• Let Android developers link to ways to download their apps outside of the Play Store
• Let Android developers set their own prices for apps irrespective of Play Billing

Google also can’t:

• Share app revenue “with any person or entity that distributes Android apps” or plans to launch an app store or app platform
• Offer developers money or perks to launch their apps on the Play Store exclusively or first
• Offer developers money or perks not to launch their apps on rival stores
• Offer device makers or carriers money or perks to preinstall the Play Store
• Offer device makers or carriers money or perks not to preinstall rival stores

Thanks Mr. Epic Judge