It is OK.
It's best if sources try to exhaust their source allocations, even if it means giving posts higher amounts than is typical. If you have 150 source merit and you only see 3 merit-worthy posts in a month, then I'd rather you over-give each of them 50 merit than let the merit expire. That way there are more people capable of sending merit, and the "merit economy" is less top-down.
whoever post this should reference here. this is the right answer to your thought. it is clearly written that if Merits are not given out, the owner will loose it. whether he deserve it or not. it all depends on the decision of the merit source. he choose to give out the merit at his own digression. kindly accept.