Here’s another way restaurants can get more customers into their loyalty program: Don’t allow them to check out anonymously when they order online. That’s the strategy employed by loyalty software provider Thanx, which ensures that every person who places an online order from a restaurant gets added to its database. “We do not offer guest checkout, and it is definitively because it’s fundamentally the best way to improve your marketing efficacy,” said Emily Rugaber, Thanx’s VP of marketing.