Please take into account the fees LL actually charges. it's not just the 2,5 % that now will be 5%. if you sell an item on MP, you pay 5% to LL, then you want to convert your LS to US, where LL takes another 3.5 %. THEN you want to cash out where LL would take another 2.5% which is now going to be 5%. So doing some math here.. this is not "just" 5% . Not to mention other fees that apply , be it membership or wanting to rent to be even able to sell things inworld.
Don't forget if you are from another country, 3.5% plus the conversion rate. It's gonna be expensive for content creators. And