Many missionaries offer money as a means of demonstrating that their beliefs or arguments are true. One such person made a challenge and I duly responded. You can see the notifications of his responses to me here:

Unfortunately, asking for the rules and conditions of his challenge, caused him to suddenly block me.

In the above photo you can see that only my comments are available, despite him having commented and replied to me as indicated by my notifications. I suppose blocking real challengers to your challenge is one way of keeping the money…

And God knows best.