I have seen Prezis which do this. But for every good one, I’ve seen plenty which are visually dazzling to a point that they obscure the message, like those fantastic TV commercials which are highly memorable – but you have no recollection of which product they were advertising. Memorable, but ultimately useless. And while vision is our most important sense, don’t forget that the most important visual of all is the speaker, not the slides. Your expressions, movements and gestures add meaning and colour to your presentation, and help to make you more convincing and credible. None of which will happen if the audience’s attention is always glued to the screen.

I don’t think of added technology as a key part of a presentation though – more an occasional and optional extra. In most of the big conference rooms I see (and I see a lot), the network is either unavailable or saturated so the use of live technology simply isn’t practical, plus the vast majority of presentations happen in small meeting rooms inside companies, with private material that isn’t going anywhere near Twitter. And those are the presentations that need the most improvement.

While there are some great tools – and I’ve used some, like Wisembly, in my own conferences – I prefer to promote actual live, organic interaction wherever possible.

People remember 10% of what they hear, 20% of what they read and 80% of what they see. -Forbes.com

Seriously, if you are not capturing your audience with visuals why the heck are you giving a presentation?

This argument is seriously archaic thinking.

No idea what the BBB is – perhaps that’s particular to one country. Note: I removed your statement regarding how they allegedly feel about Prezi because I don’t want to get into any legal hot water here. This is a place for discussion about presentations, not complaints about companies, so let’s stop this conversation here please.

Anyhow the message to readers is clear: if you sign up for a pro Prezi account, expect that you are going to pay for it, and frankly any time a company asks you for your credit card, it’s usually because they’re expecting to take money from it, so if it looks free but requires a credit card, read all the small print very carefully.