Got profile trade spammed after getting my 1st 5*

You disappoint me mobage....:S

that is just normal it is where people advertise their cards along with the list of top10 players from the previous event.

There is not a chat function or auction house function in the game, so the rcr (rare card report) and the current leaderboards are where people go to list cards for buy/sale/trade. It is NOT considered bad form to advertise on the walls of the people who are currently listed on the rare card report. When you pull a 5* 6* or 7* card you will be listed on the rcr for some period of time - however long it takes for three more people to pull high cards. What you experienced was just a temporary spamming while you were on the rcr.  

After you play the game a while, you won't mind this anymore. Many people are refreshing the rcr regularly to see current listings. If you are lucky enough to get a good pull, you don't need to refresh the rcr, just look at your own wall. Convenient!  Or, ignore your wall for a while and spend quality time with your lovely new card   

Note: Many of us, however, do consider it bad form to advertise on random people's walls who are not listed in the rcr or on the leaderboard. (I only post an ad on non-rcr / non-leader walls if someone does it to me first. And if you do, at least please send me a brave for f* sake.)

Since its your first 5* you might view it as spam. But in the long run, you'll be happy to see these ads - especially if the card you pulled is a card that you'll just end up selling since oftentimes the ads are people wanting to buy the card you just pulled.

For people who have been playing for awhile and know a little about the price of the cards, it is a good form of advertisement. However, it is also a nightmare for newer players because some people love taking advantage of the facts that the newbies don't know the market. For instance, I saw a new player got a Monica last night, and then someone immediately offered to trade Anastasia+a junk 5* for Monica... Luckily the new player is only lvl 18, and someone got a chance to warn the new player about the trade value before the trade took place...