Are the small usb miners worth it?

[ChuckBuck]

I'll start off by saying that I am currently using my gaming rig as a miner and that gets me around 560 kh/s (R9 280x in my current card) and I was wondering if the little usb mining dongles I see on ebay are worth it?

Code:

http://www.ebay.ca/sch/i.html?_from=R40&_sacat=0&_nkw=usb+bitcoin+miner&_sop=12

Like these for example.

If I am guessing this right (which is all it is, a guess as I've been in this mining stuff for 2-3 days now) 2 of those dongles (depending on what ones I got) would give me around the same khash rate that my card is currently giving me, but with a lot less power being used. In particular I was looking at this one:

Code:

http://www.ebay.ca/itm/1-ASICMiner-Block-Erupter-USB-Bitcoin-ASIC-miner-330Mh-s-In-Hand-Ready-To-Ship-/201062264962?pt=LH_DefaultDomain_0&hash=item2ed03eb082

With the bitcoin pool I am in right now, I get around 0.00219831 BTC per day (not quite a day because I used my PC for it's actual purpose of gaming for a few hours yesterday) but with a lot of wear and tear on my GPU, which, in reality I would much rather use for gaming. I did put around $1400 into this rig after all lol.

So long question short (to late for that?) is it worth getting a few of those smaller usb dongles to save wear and tear on my GPU?

Also, anyone curious as to the pool I'm currently with, it can be found here on these forums.

Code:

https://bitcointalk.org/index.php?topic=448649.0

Many of you likely already know of the pool.

Thank you for taking the time to read this, and I look forward to your responses.

Silly question, but why did you use the Code instead of URL for your links?

[STT]

Wear and tear on a gpu happens when its switched on.   The fan might wear out but thats it mostly.

Its not worth really messing around with asic, you already own gpu and its useful to you so just use what you got.   asic doesnt do anything and it may not make any more profit then a gpu

I think most people here use their USB miners on a Raspberry Pi to solo mine and hopefully win the 25BTC jackpot...

That'd be the ticket, lottery ticket and cheaper then playing bingo probably