To clear a few matters up here are a few questions and answers to the new tokens expiry.

Do Tokens expire now?
Yes, tokens purchased AFTER 20th July 2015 now expire 90 days from when they were purchased.

What if I receive tokens, do these expire too ?
From what Chaturbate have stated, NO, these do not expire.

I purchased tokens before 20th July 2015 do these expire?
No they don’t.  The expiry date of 90 days, only applies to new tokens purchased after 20th July 2015.