There are two types of people who frequent this site.
Those who are genuine about exchange language and interacting with people in an honest way, and those who prey on those with good intentions.

The latter unfortunately, make up the majority of users on interpals. The genuine people quickly get driven away by nuisance messages from people who want to 'be friends' but cannot even be bothered reading a profile to get to know a person, scammers, people who want a free english tuitor and those who want a free peep show or an internet fling because they lack the social skills and/or personality to be able to go out into the world and form meaningful real relationships... or they want a meal ticket into your country by way of 'falling in love with you' after a three sentence exchange (does this method ever fool anyone? Really?)
Also there are those that use this social platform to advertise how physically beautiful they are.
Enjoy it while it lasts, because once that fades, you'll have nothing. And fade, it will.
If you value your time and you're a good person, stay away from this site. It is pure unadulterated garbage that attracts and retains filth.