Your mindset is very scary to me because a lot of others think like you. If someone earns options over one, two, two and a half year period and then is deemed "toxic" to the company, why should they not receive similar compensation to someone who lasts 3 years in this system? 3 month exercise windows are strictly for investor class and thus founder class.
Employees aren't facing dilution problems from their fellow employees who get to exercise their options while exiting, they face dilution from the investor class trying to own as much of the company as they can.
Employees aren't facing dilution problems from their fellow employees who get to exercise their options while exiting, they face dilution from the investor class trying to own as much of the company as they can.