I'm pretty sure between beta 3-4 will be 3 weeks. Beta 1 was released June 10th, expire date was July 24th. Beta was out June 24th, was set to expire August 8th. 3 came out July 8th and expire date is August 29th. If the first two betas are correlated Beta 4 is coming out july 29th. Which is 21 days, aka, 3 weeks from now