@Dsel887
They'll send lots of spam emails to you. If you put your personal information in your email, they may also have that information as well.
In my case, despite having 10 other disposable emails. I always use my main email in any sites that I deemed necessary WITH THE FUCKING SAME PASSWORD.
I'm a bit fucked up in the head. Don't be like me.
Well, that's the past. Now I use unique password for each websites.
Strangely enough, my other 10 emails never got pwned despite using them in much more shady websites.