I understand, that the app-ads.txt file should be hosted under a domain (or a subdomain) root. The problem is that currently we do not have any registered domain/subdomain, the link we provide in Google play store points to our Facebook page. I've tried a free app-ads-txt.com service, and it almost works, except it would not allow comment strings (starting with "#") and crashes when trying to update the file content with a second google.com entry...
Any suggestions on other ways to host the app-ads.txt file?