Shaking the lulav in COMBINATION with getting a good education and job skills has repeatedly been shown to increase the likelihood of earning a good parnassah. Shaking the lulav alone may not yield such outcomes (sort of like taking hydroxychloroquine without the zinc).
Leiby Wasser There was no mitzvah deoraysa this year on arba minim. Md is only first day and this year was Shabbos. Otherwise it is zecher to Bais HaMikdash where it was md everyday.