Worked for me. Just found out about TopGuest too. Hopefully they have alot of Singapore properties, being so small, I can hit multiple every day!
You can only get one credit of 50 hilton hhonors points per 24 hrs for your Topguest check-in, so multiple times a day wouldn't do anything other than flag your account as a suspicious account. (There are lots of posts on flyertalk and even here on slickdeals about how people have been having their accounts suspended.)
Also, double check the locations are valid with the participating ones that Topguest.com has listed. (They have a locator on their website at topguest.com.)
Slickdeals is able to share the best deals because of the contributions of users like you! If you found a great deal,
please share it with others by posting in our forums.
Welcome to Slickdeals!
Save money here by finding the lowest and cheapest price, best deals and bargains, and hot coupons. We're all about
community driven bargain hunting with thousands of free discounts, promo codes, reviews and price comparisons.
Don't worry, we'll help you find your way. If you haven't already, check out this
that explains the features of our site.