Will the one through whom eight Filipinos embraced Islam be rewarded, despite his shortcomings in the worship of his Lord?

You will be rewarded, Allah willing, for your call to people to Allah, even if you fall short. Indeed, calling to Allah is among the best of sayings, as Allah Almighty said: "And who is better in speech than one who invites to Allah and does righteousness and says, 'Indeed, I am of the Muslims.'" And you have a great reward for guiding one person, and whoever guides to good will have a reward like that of its doer, and whoever calls to guidance will have a reward like the rewards of those who follow him. So continue your call to the religion of Allah.