The INK Bold and INK Plus sign up bonuses have been increased from 50,000 to 60,000 after spending $5,000 in 3 months.
The INK Cash sign up bonus (no annual fee) has been increased from 20,000 points to 25,000 points.
I wouldn't get too caught up with this increase. If you signed up recently and got the lower bonus, send Chase a secure message and you should be matched to these increased levels. Also, if you sign up after this week you can likely still send a secure message to Chase and be matched to these levels for the next 3 months.
Check out this post by Dan's Deals if you want to sign up for the cards and support his blog.
Hat Tip - Susan Solovic via Frequent Miler