We have implemented algorithms for new accounts to make sure they do not raise any flags with Instagram on the number of activities when first using #Likes.
For the first five days after you sign up, you will be in "slow-start state", your speed will increase step-by-step to reach a normal point. This is to decrease the chances of Instagram flagging your account for overuse.
If your account is large and had a lot of activity previously, please change the account speed under likes/settings and following/settings.
Once you are out of the slow start state, you can modify the speed from the following settings: