Simply put yes the cost. You are billed on the number of dyno's, and database storage. Overtime this is only going to get bigger which means costs will only ev

Simply put yes the cost. You are billed on the number of dyno's, and database storage. Overtime this is only going to get bigger which means costs will only ever increase. It will get to a point `1day` where you will be looking to bring this cost down by managing your own web servers.