Unlimited free call to Bangladesh (both landline and mobile)

Now a new Betamax VoIP has lunched and they are offering unlimited free call to lot of destinations including Bangladeshi mobile and landline. For the foreign residing people of Bangladesh its a great offer. But the free call is limited to 200 minutes per week means 800 minutes per month. And if you exceed the free 200 minutes then they will start to charge 2.5 euro cent per minute from the rest. But still its not bad at all because here every month you are getting 800 minutes and if you would use another VoIP (like webcalldirect.com) then you need to pay 12 euro (because webcalldriect costs 1.5 euro cent per minute). But now its free and your initial 10 euro credit is also remaining.

But the main problem in this kind of offers given by Betamax is that it doesn't last too long. When people start to use it in huge amount then they just stop the promotional offer/service. Because you see that in their website they have written that at any time they have ability to change/modify any find of price rates/offers. But I think this time it should last a bit longer because it is (means Rynga) a very new VoIP service offered by Betamax and so Betamax will try to promote this newly lunched VoIP by giving very attractive offers like this (means this great offer for Bangladesh). So, whats your opinion!