Which dating site leads to the most marriages?

Match.com has a reputation as a better place to search for long-term relationships than the more hookup-friendly OkCupid, and science backs that reputation up: According to one study, Match.com and eHarmony produce the most marriages of any dating sites or apps.

Can someone tell if you look at their bumble profile?

Literally, the answer has to be no unfortunately. Bumble officially doesnt allow such things. It used to allow users to see when someone you have matched used the app for the last time. Not just Bumble though; all the swipe-based apps often dont provide such privileges straightaway to the users.