I haven’t met many people who use Facebook’s accelerated delivery for ads. The reason why people don’t use that option, beside the fact that many people don’t even know about it, is that accelerated delivery consumes your daily budget as quickly as it possibly can ignoring to spread it evenly through-out the day.
The problem with this kind of execution is that you’re basically asking Facebook to win all the bids possible in order to serve your ads which means you’re willing to pay as high as possible to get the results. Then why would I or someone else possibly use this option? There’s a very good reason for that and I’ll explain this just in a bit.
I scale a lot of my campaigns with manual bids. For example if a campaign is working well for me @ $100/day ad-spend but suddenly stops working for me at $200/day ad-spend, I can’t possibly scale this campaign using automatic bidding. I’d instead scale this campaign by placing a manual bid of say $20/purchase and setting the budget to $1000. If Facebook can find me $20/purchase, it will spend all $1000. If it can’t get me any purchase in that amount, no budget will be spent. If it can get me a few sales in that cost, the budget will be spent accordingly.
Even with manual bids, Facebook will also attempt to evenly spread my budget through the 24 hour period. However, that may be unnecessary with manual bids. When I’ve provided a cap per result, I would ideally like to spend all my budget even in a 1 minute period as long as the cost per purchase is met. And this is where the accelerated delivery does the job just right.
In summary, I like to run most manual bid campaigns with accelerated delivery in order to steal cheap bids as quickly as possible, even if that means spending day’s budget in an hour.