so seeing this with the mobile part seems strange.
Mobile company pay the cash to its ambassador or organizer or host etc. as 'debit' / expenses, as far as bloggers’ concern, either company may give releasing smartphone (which can be used, or sell it for around 80 to 90% of the current rate and encash it), or company may give a small gift with snack/lunch/dinner etc. as 'Credit'. It is all depend on the company's scheduled budget, type of company, type of events like embargo, or launch, or release, or ad campaign etc.
how exactly is the cash part beneficial for both- companies and the blogger
Company will show the expenses / ‘debit’ for the Advertise campaign (saving IT as well) which is very important for the company including ‘debit’ column has to be some figure/amount in the Tally’s latest version. And blogger will participate in the campaign or contest, make an effort, show the winning, 'credit' and happiness due to product post detail on a blog “with a link of company / product” that also leads to a popular ad campaign globally via internet source, thus both gets benefit out of here. Company again save cost here.
Company or organizers are smart, they would transfer cash to bank a/c or give a cheque, and won’t give cash unless and otherwise a different approach.
Blogger becomes temporary and mini-ambassador for the company when he/she accepts for the contest or campaign and participates, so, obviously blogger has to support the product including minor negative points can be shown on the blog (which normally ignores it by the company unless otherwise calls from them or ineligible entry) that generally doesn’t do it by the company’s or product’s real ambassador during their contract.
I seriously believe they should pay for ad space instead
That is separate one and you can negotiate for ad space as well. Don’t mix both of them and lose them (for blog post with link and ad space). You can do both of them.
It will be good if any company pay cash/EFT just for attending an event, like blog post with link, ad space and so on separately
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Note: I am afraid of my name in the IB Forum hero list or black list by answering as such
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