When you meet someone on JDate set rules cannot be applied. I am a big proponent of using JDate as a means to an end (meaning if you are on JDate then you should use the website to meet someone in person not just waste time trading emails back and forth). At whatever point you offer up your phone number (I recommend almost immediately) the clock starts ticking down from 48 hours — that’s 2 days, which is the expected time frame you would call someone if you got their number after meeting them at a bar.
But if the other person isn’t ready to call or isn’t totally convinced you are worth it, then the digits will be ignored and another email will be sent in its place. This is not always bad, but you should set yourself a time limit for a phone call, and when plans should be made by, before abandoning ship. Concessions need to be made, whether it’s allowing a phone call after two days, accepting a first date in the middle of the week or overlooking typos in emails and text messages. Relationships need compromise to thrive, even if that means meeting halfway from the first day.