I like to submit a request, but Captha doesn’t work at all…
second, why I need to add $20 dollar for just a few dollars I miss?? Isn’t there another way? If not, I have to say goodbye to Envato, sorry…
FIXED! Since 2019 it’s possible to add a small amount to credits! 
Thanks!!!
Unfortunately it is an official thing and unavoidable https://help.market.envato.com/hc/en-us/articles/202500304-Why-is-there-a-minimum-20-credit-on-Envato-Markets-
You can buy directly without credits (maybe a $2 handling fee) which would get around it.
For what it’s worth fiver is hardly the same thing as envato.
Most marketplaces (certainly the main competitors to here) have minimum deposit levels or direct purchase (as envato does).
And will never again recommend it to anyone!