ADA requirements for consumer-facing websites are supposed to go into effect in 2018, but some are starting early. Winn-Dixie built their website in 2015 and has now earmarked quarter of a million dollars to make it ADA compliant, based on recent court ruling.
Link - https://www.courthousenews.com/judge-holds-winn-dixie-supermarkets-website-violates-ada/