Could be used for alot of sites. The domain name does not have any keywords people search for so you can use it for any site you want.
I personally don't think it's particularly great. I don't find it very memorable, and it doesn't seem to be a phrase people would associate with freebies or deals.
It isn't a good name. There are internet sites which will help you find available web sites given keywords. Sit down and make a big list of keywords (with positive associations - don't call your site crap4sale.com). Then submit them to an engine. Here is a free keyword suggestion tool freekeywords.wordtracker.com/ Being a dummy I didn't think about using these things when I came up with my company name and associated '.com'. I wrote a program that randomly combined words. I took the ones which looked cool and checked for availability (many online tools do this automatically). Consider trade marks at the same time you check for a web site. If you chop one letter off a word or mutilate it in some way that makes a stronger trade mark. I came up with modartis.com (modo latin for exclusive artis latin for skill/craft) for a company which I'm using for hand painting dolls but which I'm leaving open for other craft/skill to be added to my products later. I dropped the last 'o' in modo to give a stronger trade mark. First I registered the '.com', then I registered the company name, then I thought of ten better names..
Maybe "Freebies4All" or something like this. Ok, it may not be great, but I agree with the other comments: "Just4All" is too generic and may not be associated with freebies when people see this name at the first time. It should be more direct or, at least, specific to the kind of freebie (or its content) you want to give. By the way, checking keywords can be a good idea.
I'd agree that you should use a good keyword in the domain url. The domain is nice and short but seems somewhat "spammy" to me.. not sure why.. maybe it's 'cause of the "4" in it.
You must try to avoid using numbers in your domainname. So..you start a blog on freebies, right? Why not freebie+blog? freebieblog! The .net domain is still available. freebieblog.net looks good. If you really want an exclusive name you should consider; freebie + go! All the domains for freebiego are available. You can obtain freebiego.com (Unless someone beats you ) The name Freebie Go has a nice ring to it, doesn't it? Do I get a freebie now?