That commercial is such a lie. Of course I can’t say for all churches, but I figure every one wants to have people come and occupy pews, even if it’s (sadly) only for the “nickels and noses” rule. The stumbling block is that a true church will only want believers who profess the true faith to actually join but I’d be surprised if anyone would’ve been excluded from coming. At one church I attended, I was told there was someone attending who wanted to join but could not honestly give assent to all or some essential Christian beliefs. He was told that he could not join but that they wanted him to keep attending in the hopes that he would come to believe the essentials. Then, they would be happy to let him join.