The future is probably going to be:

• Whitelist federation models with invite-only instances.
• Anubis and similar software being a base requirement for operation.
• Getting creative with stuff like picture-based logic puzzles as a type of captcha.
• A retreat into less publicly visible spaces like chat apps that you can only get access to through networking.

Yeah, and with the corporate culture that MBAs bring with them, they also tend to make everything as boring and sterile as possible since any degree of fun and personality could be seen as off-putting to a hypothetical person.