What value is there in my newsletter or advertisement reaching you if it’s not appealing enough that you would want to receive it anyhow? And if you wanted to receive it, then that probably means it wouldn’t have been blocked by the spam filter.
In fact, all modern spam filters work on the premise that email has value if the end user interacts with it materially. Spam and low grade marketing receives very little interaction; this is why it is rejected.
The BitBounce guys are burning crypto hype. When that runs out, they will join the pile.