By giving with one's own hand, one makes merit. By urging others to give, one makes merit. If they also give, after being urged to give, they make merit. Even if they don't give, if they have the wholesome thought of rejoicing in your giving, they make merit.
Likewise for all other wholesome actions. Sharing increases the merit for both parties.
However, if those urged turn around and try to discourage, or succeed in discouraging you from doing wholesome actions. Then they make demerit, and you lose merit, or make demerit if you adopt their negative view, e.g. that giving charity, observing morality, or practising meditation is just a wasted effort.
• • • • (Upasampadā: 24th June, 1979)