I landed yesterday at Rainbow bridge around 9 pm. We are inland applicants and we did flagpole. When we returned, the officer said they already received the maximum number of landing applicants for that day and recommend us to go to another bridge or book an appointment. Then, he allowed us to go and talk to someone inside the immigration. Then, we talked to head of the department and he explained the same thing and gave other options to land. We were almost ready to come back and luckily there was another officer said that he can do it for us and the process took only 15-20 mins. I think it was a gamble and we were merely lucky. The officer confirmed that they would not process any flagpole applicants from Fri-Mon. If you want to go here on Tue-Thurs, go early, otherwise, you are taking a big gamble. This is valid only for inland applicants who do flagpole, if you are outland applicant coming from the US, they are obliged to serve you.