You do have to use them correctly. I know a lot of people who use them irresponsibly, who don’t have the emotional intelligence to understand how the experience is going to be different(and therefore manage their emotional expectations*), and who match with way too many people for basically nothing while denying others over trivial things.

*You should be very into people and they should be into you, but how crushes develop from online dates is simply fundamentally different. You will likely not get the same “oh my god who is that?!” moment from someone you’ve already spoken to and who you know already wanted to go on a date with you.