Is it too late to become a Node operator?

Hello @multiplicity,
Welcome to the forum!

It was payment for January 2019 with surge and a lot of test data downloaded.
Now it back to normal. Since your node still have a held back from your earnings (75% for months 1-3, you can read more there: How does held back amount work? - Storj Docs), it’s expected to receive a low payout during first 9 months.
You can check what to expect with this

Running a node is profitable from day 1 only if your hardware will be online anyway - with Storj or without, in this case any income is a clear profit and can be a nice discount to your bills.