I am based on Mexico and never heard of your site before this. If they are real visits, one possible explanation that comes to mind is that it's holidays (Semana santa) here which also applies to other latin american countries so maybe just people just want to play.
As an extra thought, maybe it became viral by sharing over Whatsapp, so I am pretty sure seeing referrals if you didn't make a campaign it will be pretty hard to pinpoint.
As an extra thought, maybe it became viral by sharing over Whatsapp, so I am pretty sure seeing referrals if you didn't make a campaign it will be pretty hard to pinpoint.