Wallace was actually guilty, he didn't know what the crawler magic crystals were for.
He didn't have a use for it so it's the only thing he could give. However, he is sure that it would be useful in the future, though for now, he could only give it to them.
Was it because of pity?
No!
It was because these three poor people were the only ones there for him whenever everyone was planning to go against him in the future events that the system would bring.
Yet, as soon as Wallace thought of that, in his hologram mask, in the chat, while the townspeople were congratulating the three beggars for receiving something from him, one of the beggar little ones, which is a beggar child, would speak, [ Sir, is this real? Are you really giving us something big? ]
The beggar child continued, [ Sir, we are rich! We are rich! ] And the smallest of the three, the beggar little one, added with amazement, [ Sir, you gave us a lot… ]