ActiveMining is currently hashing at 17.2KH/s per share - current dividends present a 25% annual ROI at current difficulty. 10,000 chips at 16gh/s each increases that to 6.4MH/s per share.

With a doubling of network hash rate every month, and with just a measly 10,000 chips mid-november, ActiveMining dividends will provide 2200% annual ROI at current prices. It's more likely 25,000+ chips will hash for the company in 2013, plus mining hardware sales.

This is why ActiveMining is a good long term purchase in my opinion.