My solution is to make it less of a walled garden. At the moment, they often refuse even reading a single tweet when not logged in. And for the "simply log-in"

My solution is to make it less of a walled garden. At the moment, they often refuse even reading a single tweet when not logged in. And for the "simply log-in": It is even more expensive (way more expensive) to get good email adresses as it is to get good IPs. Email providers have very tough checks these days before they give you one.