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I just tried the service 000Webhost.com and after some days, they emailed a cleanup rutine:
It's been a while since you've been on 000webhost, and we wanted to make sure that you're still interested in website mystery.000webhostapp.com. If so, just hit this button:
Keep my website
If not, you don't have to do anything. If we don't hear from you within two weeks, we'll just send your website to sleep. You can come back and wake your website anytime, whenever you’re ready. All your content will be here when you get back.
Team Hostinger 000webhost
P.S. Remember at hostinger.com you will always find the best prices for domain names and premium web hosting services! Read full Hostinger review and leave your comment @ hosting.review
But it was only yesterday since last login on their controlpanel.
How do you deal with old stuff on your servers with free hosting?