To stay in a country without permission is not a crime unless you receive a deportation order and disobey it. I actually did it in the past. I lived for two years in one of the countries at the cost of Europe.
I didn't quite figure out what you are really looking for, as you mentioned︊ yourself, the case is a bit confusing.
But it seems to me that you could︋ register yourself normally *as Russian* on any possible affiliate marketing platform that you may already︌ know and receive the money on your Belgium account.
You can spend the money from︍ your Belgian account in Spain or wherever you go using your smartphone. With NFC technology︎ you pay anywhere without having to have a physical card, as you may already know.️ NFC technology is available in most modern smartphones nowadays, even in not-so-expensive phones. As you stayed for long out of the banking system, using more cash-in-hand, you may not know or not may have not used Contactless Payments, so here is a link from
Contactless payment - Wikipedia where you can learn more.
In brief, by having your bank account opened you probably can request a debit card, and this debit card can be associated with applications on your phone such as Google Pay, Apple Pay, or the app from your bank account. When you go anywhere you can tap your phone on the POS in the same way you would do with a physical card, except that you do︀ it with the phone.
If your Belgian bank does not provide you with virtual debit︁ cards, try other banks/fintech like Revolut, Wise, Silverbird, and others. There are several. They are︂ fully online banks and they provide you with virtual bank accounts as well as virtual︃ cards so that you can spend the money from your account in shops, restaurants, etc︄ without having a plastic card. In these banks/fintech, you can open the account normally as︅ Russian, and prove your address using the same method you used to prove it to︆ the Belgian bank then, once the account is activated you can create a virtual card︇ and use it anywhere via NFC technology on your smartphone.
I hope you are telling︈ us the truth. I would hate myself forever if you are actually a beginner Russian︉ spy... Don't get me wrong, I have been to Russia twice, and I really loved︊ the people and the country, I spent two months there, however, the current situation disregards︋ explanations.