I haven't checked Icobid price but i think swapping my coins to Waves token for 1 WAVE costs more

This is not swap ICOBID to Wave token.
This is just adding ICOBID to be traded on Waves Decentralized Exchanges.
You hold all ICOBID you are having and receive more ICOB-W based on amount of ICOBID you hold.
This step encourages ICOBID owners to hold and stake ICOBID and increase value of ICOBID and also we utilize Wavesplatform to actualize Icobidplatform.
Fee of 1 Wave will be used to create a buy wall on DEX.
I have a question though, Pioneer. What will happen to the unlinked Icobid in terms of the Waves Asset?
If you only get 50 million Icobid linked, what will do you with the remaining 100 million Icobid-W asset?