If you're used to linking Dropbox to every device you own, you might want to reach for your credit card. Liliputing has noticed that Dropbox quietly started limiting its free Basic tier to a maximum of three linked devices as of March. If that's too confining, you'll have to shell out for a $10 Plus or $20 Professional subscription. You can keep any links you've already established, but you won't get to add any more until you go below that three-device maximum.