It may or may not make a difference, but just the gesture could make the company care more about my property than normal.  

I would think bringing him to a nice sit down place (not a chain, something a bit nicer, figure spending $100 or so for the two of you) would be a nice gesture.

While it is only a token gesture, it is far more appropriate than "Congratulations" or "Congrats" or "Happy Investing".

when putting up earnest money to get a property under contract, if is a good faith gesture signifying that you intend to buy or have/find a buyer... understood.

I think it is a nice gesture 

So if the rent is $900 a month, a $30 gift card would be a good gesture to enhance goodwill. 

I gave her a $100 gift card as a gesture of partnership and intent.

Rent is ~500 per month/unit.So far I've only received one complaint because the contractor was working late one night, but I would like to offer a gift or rent reduction to the other 3 units this month as a gesture for putting up with the disturbance.Any suggestions or things to consider?

I think the prorated rent is a nice gesture. $500 for moving expenses?

Thank you for taking the time to remind us that we have to be vigilant and hopefully you've prevented some of us from having to make our own mistakes (although you, in fact, didn't make any).Paying the deductible is a really nice gesture.