Here is the list of free vps services which allows you to mine for sometime. most of them ban your instance after few hours, but you can always create a new instance.
All of these above companies provide free 300$ credit or so. you can make use of them to mine your cryptocurrency.
they ask for credit card info, you need to enter your details.
only on azure you can enter fake cc, on all others you need to pay a very little amount of 0.05$ as a registration fee, which will be refunded in few working days.
if you know any other free vps which can be used for mining, let me know in comments.
