but i have a feeling that as soon as SegWit adoption goes higher the spam attack will slow down and stop.
I see at least 2 possible culprits for the spam attack:
* companies like the biggest exchanges, which didn't switch yet to SegWit although they have huge number of transactions.
* some (possibly Ver-affiliated) miners
People already started petitioning exchanges.
I've read that some miners are just being relocated out of China, it may be a reason for the latest drop in the quantity of spam.
Someone here did say it was about 20% cheaper in fairness when he used a Segwit wallet but most exchanges
are not supporting it yet so was it just another money making scam by the miners who seem to have the ears
of the Bitcoin development team.
OP, you missed quite some info about SegWit and such. You are not right. Let me summarize, from what I know:
Most exchanges use their own logic and their own, usually fixed, fees. They could do better, but they don't. At getting Bitcoin out of exchanges you most probably not gain anything on the fees.
The fact most don't know of SegWit just means you have, for a start, to use 3.. SegWit addresses (as opposed to "pure" SegWit address), which they know and can handle.
If you use SegWit address you should have smaller fee at sending Bitcoin.
So if you do it right you have a chance to save some money from fees, clearly not paying more.