Crunching The Numbers On The EveryDay Preferred & Blue Business Plus Cards

can you use Blue Plus on gift card purchase & earn 2X?

specifically vc/mc/amex gift cards.

I expect many do like I do. I get the EDP card and do 30 transactions only one or two months per year. Within those 2 months I max out grocery spend at $6,000 (by supplementing groceries of course). Therefore I take the max benefit from this card and put true everyday spend on something more lucrative, like retention or spend bonus cards or the SPG card if there is no better opportunity.
SO under this scenarion I receive ($6,000 * 4.5 amex point/$ * $0.017/amex point) = $459 in value per year at a cost of about 0.84% (assuming about 70% of the grocery spend is on gift cards at a 1.2% rate - $6/card) or about $50. Throw in about $4 for the money orders and total cost about $55. Then subract the $95 yearly fee.
Under this scenario you would net about $300 profit for using the card for about $6,000 spend during 2 months. I also make sure to put all my gas on the card those 2 months to max out the gas bonus to add a few more dollars to the above.
Someone can take this further and look at opportunity costs for lucrative categories such as groceries or gas that some cards offer, but I find this to be the best use (misuse?) of this card.
Whether or not $300 profit is worth the hassle a couple months per year is a personal call. I don't work so time is not at a premium when I am not travelling so $150 per month for an hour work max is worth it.

I find I get more lucrative Amex offers on EDP than the blue for business (BBP's predecessor).

@fathiss TY. You just sparked my creativity.