At this moment, yes, most tribe tokens have the 7-day payout schedule...

But, for example, you have some sort of ads (or other source income for your front end), you follow the impressions on posts, and share those rewards in the form of tokens weekly/monthly with authors... In that way, distribution would be fair as those who attract the most views would get the biggest share...

It is a bit of thinking outside the box, but it could be done...