MATHS TIME
I've been wondering this for a while too.
I had 252 gifts. Gifts are 700 each, total gralat expenditure was 176,400. I got 9 mounts, 8 juggles, 1 morph, 1 umbrella, 48 hats and 55k (sold furniture too).
CALCULATIONS
These prices have been taken from current prices and previous prices. Please take into account that everything received from gifts is luck based and not necessarily what the player wants to have - so that plays a factor in the overall worth of the items. Keep in mind, these are just rough predictions and really only apply to those who get >10 gifts.
Mounts
(Average mount prices are based on mounts from previous holidays and stables).
Average price of a mount is $7,000 (7,000x9=$63,000). Mounts equate to roughly ~33.33% of total gralats spent.
Hats
(Average hat prices taken from current hats in Nafet's River Hat Shop).
Average hat price is $4,211.11 (4,211.11x48=$202,133.28). Hats equate to more than total gralat expenditure, ~115%.
Juggles
(Average juggle prices taken from Nexus' and previous holidays).
Average juggle price is $2,500 (2,500x8=$20,000). Juggles equate to roughly ~13% of total gralat expenditure.
Morphs
(Average morph price is taken from Nexu's and previous holidays).
Average morph price is $8,000 (8,000x1=$8,000). Morphs equation to roughly ~5% of total gralat expenditure.
Umbrellas
N/A, have never been sold for gralats.
Furniture and gralats
I got back roughly ~$55,000 back from selling furniture and getting gralats from gifts. It's also important to note that furniture sells for half the original price, so the furniture and gralats added up together would be ~$110,000. However, I'm only taking the first number of $55,000 and using that in calculations.
TOTAL WORTH
63,000 + 8,000 + 20,000 + 202,133.28 + 55,000 = $348,133.28
Profit: 348,133.28 - 176,400 = $171,733.28
FINAL VERDICT
Overall, I spent $176,400 and made back roughly $171,733.28 worth of items and gralats. I essentially earnt back what I spent. Please note, that this does not include food so I assume if you added that up you'd be pretty much bang on how much you spent. So yes, they are worth it in my opinion, however, the item values are a bit tricky because the player cannot choose if they want the hat or not - 700 is a fair price for a gift.