If you do surveys via e-Rewards (sometimes Accor has a sign up link for specific countries) my experience is that once you redeem a few times, Accor redemptions typically post you your Accor account within 24-36 hours. I think e-Rewards dos a daily batch processing for that unlike IHG redemptions from there, which typically post to my IHG account in 2-3 minutes.

Note that e-Rewards and Club Opinions share a parent company-Dynata.