No, it’s not an issue. 0.3 BAT is an estimation of your earning this month. It’ll be paid next month, around 5th, US time zone.
It’s normal. The number of ads you see will also depending on the availability of ad campaigns in your country and “match” found between your interest and the ads catalog.
From FAQ: Why am I not seeing Brave Ads?
The goal is to show you privacy respecting ads that are relevant to the user in the right context (a “match” is found) – not to make sure that all users “see some ads” . Enabling Ads does not guarantee that you’re going to see ads – if the system does not find a match for you in the ads catalog, then you will not see any (more information on this below).
Further, you may see ads appearing regularly today, but tomorrow you may not see any – and that’s perfectly fine . In this situation, it really is a feature , not a bug . We appreciate everyone’s understanding of this distinction and implore you to keep this in mind before assuming that the feature simply “isn’t working”.