How Many "Subscribed" Cameras are Supported on the $24.99 Interactive Monitoring Plan?

I have four indoor cameras and the video doorbell.  All show up in the app and online and record.

I've purchased five cameras and one video doorbell from the same person at SimpliSafe.  I currently have just three cameras and the video doorbell hooked up, but just because I have not tried the other two.  

Nothing has ever been said to me about having more than four cameras.  And everything I've read is that currently, the limit is 10 cameras.

I thought it was unlimited, but I only have three, including a doorbell camera. Did the price for up to $26.99 in December?? That's what I've been being charged since then.

^ a slight change in monitoring service may have resulted in your state sales tax finally being collected.  This has been rolled out to customers in sales tax states for the last several months.

I don't believe the cameras are "unlimited" - I believe it's been posted that the limit is "up to 10", and SS3's total component allotment on the system is "up to 100".

Although the cameras don't talk to the base, so don't count against the 100 sensor limit ( or the 41 sensor limit for SS2)