Both Hadiths speak of material reward. To a Muslim, everything that he earns is given him by Allah. It is not his work or his trade or his luck which gives him whatever money he may have. It is Allah who has enabled him to work and to go about his business. Luck , on the other hand, has no place in the Islamic lexicon.
Nothing just happens out of the blue.
The idea of luck, then, does not come into it in any way. What these Hadiths tell us is that Allah will give us more provisions when we foster our ties of kinship. The other part of the reward expressed in these Hadiths is a longer life. This is expressed in the Hadith in a rather unusual way. He who loves to have his trace delayed, etc.